UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D

                    Under the Securities Exchange Act of 1934

                          Rexahn Pharmaceuticals, Inc.
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                                (Name of Issuer)

                    Common Stock, par value $0.0001 per share
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                         (Title of Class of Securities)

                                   761640 10 1
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                                 (CUSIP Number)

                                Dr. Chang H. Ahn
                        c/o Rexahn Pharmaceuticals, Inc.
                            9620 Medical Center Drive
                               Rockville, MD 20850
                                 (240) 268-5300

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(Name, Address and Telephone Number of Person Authorized to Receive Notices and
                                Communications)

                                  May 13, 2005
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             (Date of Event which Requires Filing of this Statement)

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If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of Rules 13d-1(e), 13d-1(f) or 13d-1(g), check the following
box. |_|



Note: Schedules filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See Rule 13d-7(b) for other
parties to whom copies are to be sent.



----------------------

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).

                                Page 1 of 6 Pages



                                  SCHEDULE 13D

----------------------                                   ----------------------
CUSIP No. 761640 10 1                                       Page 2 of 6 Pages
----------------------                                   ----------------------

-------   ---------------------------------------------------------------------

   1      NAMES OF REPORTING PERSONS
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
          Dr. Chang H. Ahn                     Not Applicable

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   2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*            (a)  |_|
                                                                       (b)  |_|

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   3      SEC USE ONLY

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   4      SOURCE OF FUNDS
          OO

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   5      CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
          ITEMS 2(d) or 2(e)                                                |_|

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   6      CITIZENSHIP OR PLACE OF ORGANIZATION
          U.S.A.

-----------------  -------  ---------------------------------------------------

                      7     SOLE VOTING POWER
    NUMBER OF               13,500,000

      SHARES       -------  ---------------------------------------------------

   BENEFICIALLY       8     SHARED VOTING POWER
                            6,841,660 (1)
     OWNED BY
                   -------  ---------------------------------------------------
       EACH
                      9     SOLE DISPOSITIVE POWER
     REPORTING              13,500,000

      PERSON       -------  ---------------------------------------------------

       WITH          10     SHARED DISPOSITIVE POWER
                            500,000 (1)

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   11     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
          19,841,660

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   12     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
          SHARES                                                            |X|

          Excludes 500,000 shares held by Dr. Ahn's wife, Inok Ahn, as to which
          shares Dr. Ahn disclaims beneficial ownership.
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   13     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
          47.8%

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   14     TYPE OF REPORTING PERSON
          IN

-------   ---------------------------------------------------------------------
(1) Includes 500,000 shares held by Dr. Ahn's wife, Inok Ahn, as to which Dr.
    Ahn disclaims beneficial ownership.



CUSIP NO. 761640 10 1             SCHEDULE 13D                Page 3 of 6 Pages


Item 1.  Security and Issuer.
         -------------------

              This statement relates to the common stock, par value $0.0001 per
share (the "Common Stock"), of Rexahn Pharmaceuticals, Inc., a Delaware
corporation (the "Issuer"). The Issuer's principal executive office is located
at 9620 Medical Center Drive, Rockville, MD 20850.


Item 2.  Identity and Background.
         -----------------------

              This statement is being filed by Dr. Chang H. Ahn, a citizen of
the United States. Dr. Ahn is the Chairman and Chief Executive Officer of the
Issuer.

              During the last five years, Dr. Ahn has not (i) been convicted in
a criminal proceeding (excluding traffic violations or similar misdemeanors), or
(ii) been a party to a civil proceeding of a judicial or administrative body of
competent jurisdiction as a result of which Dr. Ahn was or is subject to a
judgment, decree or final order enjoining future violations of, or prohibiting
or mandating activities subject to, federal or state securities laws or finding
any violation with respect to such laws.


Item 3.  Source and Amount of Funds or Other Consideration.
         -------------------------------------------------

              Dr. Ahn acquired beneficial ownership of 19,841,660 shares of
Common Stock from the Issuer in connection with the Merger described in Item 4.


Item 4.  Purpose of Transaction.
         ----------------------

              The acquisition was made in connection with the Agreement and Plan
of Merger dated as of January 20, 2005 (the "Merger Agreement") by and among
Corporate Road Show.Com Inc., a New York corporation ("CPRD"), CRS Merger Sub,
Inc., a Delaware corporation and wholly owned subsidiary of CPRD ("Merger Sub"),
CRS Delaware, Inc., a Delaware corporation and wholly owned subsidiary of CPRD
("CRS Delaware"), and Rexahn, Corp, a Maryland corporation ("Rexahn"), pursuant
to which, immediately after giving effect to a 1-for-100 reverse stock split and
the reincorporation of CPRD as a Delaware corporation under the name "Rexahn
Pharmaceuticals, Inc.", Merger Sub merged with and into Rexahn, with Rexahn as
the surviving corporation (the "Surviving Company") and a wholly-owned
subsidiary of CPRD (the "Merger"). In the Merger, each share of Rexahn common
stock issued and outstanding prior to the Merger was converted into five shares
of Common Stock. Immediately prior to the Merger, Dr. Ahn beneficially owned
2,700,000 shares of Rexahn common stock. Dr. Ahn is also the co-trustee of the
Korean Rexahn Investors Voting Trust, which beneficially owns 6,341,660 shares
of Common Stock, (the "Voting Trust") described under Item 6 below.

              A copy of the Merger Agreement is incorporated herein by reference
as Exhibit 1.



CUSIP NO. 761640 10 1             SCHEDULE 13D                Page 4 of 6 Pages


Item 5.  Interest in Securities of the Issuer.
         ------------------------------------

              (a) As of the date hereof, Dr. Ahn beneficially owns 19,841,660
shares of Common Stock, representing 47.8% of the outstanding Common Stock. This
percentage is based upon the Issuer's statement as to the number of outstanding
shares of Common Stock as set forth in its Current Report on Form 8-K, filed
with the Securities and Exchange Commission on May 16, 2005.

              (b) Dr. Ahn has the sole power to vote or to direct the vote, and
dispose or direct the disposition, of 13,500,000 shares of Common Stock acquired
by him. With respect to 6,341,660 shares of Common Stock, Dr. Ahn shares the
power to vote or to direct the vote as a co-trustee with Young-Soon Park, the
other co-trustee of the Korean Rexahn Investors Voting Trust. Dr. Park, a
citizen of the Republic of Korea, is the Chairman of Onnuri Health Group and
Onnuri Pharmaceutical Chain Co., Ltd., a chain of pharmacies whose principal
executive office is located at 667-16 Yeuksam-dong Kangnam-gu, Seoul, Korea. Dr.
Park is also a director of the Issuer. During the last five years, to the
knowledge of Dr. Ahn, Dr. Park has not (i) been convicted in a criminal
proceeding (excluding traffic violations or similar misdemeanors), or (ii) been
a party to a civil proceeding of a judicial or administrative body of competent
jurisdiction as a result of which Dr. Park was or is subject to a judgment,
decree or final order enjoining future violations of, or prohibiting or
mandating activities subject to, federal or state securities laws or finding any
violation with respect to such laws.

              Dr. Ahn also shares the power to vote or direct the vote, and
dispose or direct the disposition of, 500,000 shares of Common Stock owned by
his wife, Inok Ahn, as to which Dr. Ahn disclaims beneficial ownership.

              (c) Except for the acquisition reported herein, Dr. Ahn has not
effected any other transaction in the Common Stock within the past 60 days.

              (d) Any dividends in respect of shares of Common Stock held in the
Voting Trust in shares of capital stock of the Issuer shall be deposited into
the Voting Trust; however, the registered holders of the Voting Trust
Certificates shall receive all other dividends directly from the Issuer. Any
transfer or disposition of shares of Common Stock is subject to the Voting
Trust.

              (e) Not applicable.


Item 6.  Contracts, Arrangements, Understandings or
         Relationships with Respect to Securities of the Issuer.
         ------------------------------------------------------

              Dr. Ahn is a co-trustee of the Voting Trust pursuant to the Korean
Rexahn Investors Voting Trust Agreement dated as of July 2003, among Dr.
Chang-Ho Ahn and Dr. Young-Soon Park, as trustees, the stockholders parties
thereto and Rexahn. The Voting Trust holds 6,341,660 shares of Common Stock. As
co-trustees, Dr. Ahn and Dr. Park have the exclusive unqualified right and power
to exercise all of the voting rights and powers with respect to the shares of
Common Stock which are subject to the Voting Trust. The Voting Trust holds
shares of Common Stock on behalf of approximately sixty individual and
institutional owners resident in Korea.



CUSIP NO. 761640 10 1             SCHEDULE 13D                Page 5 of 6 Pages


Item 7.  Material to be Filed as Exhibits.
         --------------------------------

Exhibit 1.    Agreement and Plan of Merger, dated as of January 20, 2005,
              by and among CPRD, Merger Sub, CRS Delaware and Rexahn is
              incorporated by reference to Exhibit 2.1 to CPRD's Current
              Report on Form 8-K filed on January 21, 2005.

Exhibit 2.    Korean Rexahn Investors Voting Trust Agreement dated as of
              July 2003, by and among Chang-Ho Ahn and Young-Soon Park, as
              trustees, the stockholders parties thereto and Rexahn.

Exhibit 3.    Power of Attorney dated May 16, 2005 is incorporated by reference
              to the Exhibit to the reporting person's Form 3 filed on May 17,
              2005.





CUSIP NO. 761640 10 1             SCHEDULE 13D                Page 6 of 6 Pages


                                   SIGNATURE
                                   ---------

              After reasonable inquiry and to the best of my knowledge and
belief, I hereby certify that the information set forth in this statement is
true, complete and correct.

Dated:  May 23, 2005

                                             Chang H. Ahn

                                             /s/ Ted T.H. Jeong
                                             ------------------------
                                             Ted T.H. Jeong as Attorney-in-Fact
                                             for Chang H. Ahn