You are kindly invited to visit our ECSOC-4 conference halls at http://www.mdpi.org/ecsoc-4.htm. The 4th International Electronic Conference on Synthetic Organic Chemistry is held during September 1-30, 2000. ECSOC-4 has been running this month in September, 2000. It has 150 papers presented. We have installed the search engine and the BBS for discussion. Please make comments. We are grateful to the financial support from 9 sponsors. Sincerely yours Shu-Kun Lin, ECSOC-4 Secretary E-mail: lin \\at// mdpi.org -- Dr. Shu-Kun Lin Molecular Diversity Preservation International (MDPI) Saengergasse 25, CH-4054 Basel, Switzerland Tel. +41 79 322 3379, Fax +41 61 302 8918 E-mail: lin \\at// mdpi.org http://www.mdpi.org/lin/