| DR. D.S. ALLEN, | Lederle Laboratories | Amerlcan Cyanamid Co., | Pearl River, N.Y. 10965, | U.S.A. |
| PROF. J.W. APSIMON, | Department of Chemistry, | Carleton University, | Ottawa, | CANADA. |
| DR. D.V.C. AWANG, | Food and Drug Directorate, | Pharmaceutical Chemistry Division, | Tunney's Pasture, Ottawa 3, | CANADA. |
| PROF. W.A. AYER, | Department of Chemistry, | University of Alberta, | Edmonton, Alta., | CANADA |
| PROF. A.R. BATTERSBY, | University Chemical Laboratory, | Lensfield Road, | Cambridge CB2 1EW, | ENGLAND. |
| DR. F. BENINGTON, | Department of Psychiatry, | University of Alabama, Medical School, | Birmingham, Alabama, | U.S.A. |
| DR. K. BERNAUER, | F. Hoffmann La-Roche and Co., | 4002 Basel, | SWITZERLAND. | |
| PROF. C. BERSE, | Department of Chemistry, | Universite de Montreal, | Case Postale 6128, Montreal, | CANADA. |
| DR. T. BOGRI, | Ayerst Laboratories, | P.O. BOX 6115, | Montreal, Quebec, | CANADA |
| PROF. I.J. BOROWITZ, | Department of Chemistry, | Yeshiva University, | New York, N.Y. 10033, | U.S.A. |
| PROF. A.K. BOSE, | Department of Chemistry, | Stevens Institute of Technology | Hoboken, N.J. 07050, | U.S.A. |
| DR. A. BROSSI, | Hoffmann-La-Roche Inc., | Nutley, N.J. 07110, | U.S.A. | |
| DR. K.S. BROWN, | Centro de Pesquisas de Productos Naturais, | Faculdade de Farmacia, U.F.R.J., | Praia Vermelha, Rio de Janiero ZC-82, | BRAZIL |
| DR. B. BROWNLEE, | Department of Chemistry, | University of New Brunswick, Fredericton, | New Brunswick, | CANADA. |
| PROF. G. BUCHI, | Department of Chemistry, | Massachusetts Institute of Technology, | Cambridge, MASS. 02139, | U.S.A. |
| PROF. M.P. CAVA, | Department of Chemistry, | University of Pennsylvania, | Philadelphia, Pa. 19104, | U.S.A. |
| PROF. Y.L. CHOW, | Department of Chemistry, | Simon Fraser University, | Burnaby, B.C. | CANADA. |
| DR. E. CRABBE, | Research Laboratories, | Aparrado Postal 10-820, | Mexico 10, | MEXICO. |
| PROF. J.C. CRAIG, | Department of Pharmaceutical Chemistry, | University of California, San Francisco, | California 94122, | U.S.A. |
| PROF. D.R. DALTON, | Department of Chemistry, | Temple University, | Philadelphia, Pa. 19122, | U.S.A. |
| PROF. W. DAUBEN, | Department of Chemistry, | University of California, | California 94720, | U.S.A. |
| DR. J.P. DEVLIN, | National Research Council of Canada, | R00M 2089, | Sussex Drive, Ottawa 2, | CANADA. |
| PROF. D.E.U. EKONG, | Department of Chemistry, | University of Ibadan, | Ibadan, | Nigeria. |
| PROF. G. FODOR, | Department of Chemistry, | East Virginia University, | Morgantown, W. Virginia 26506, | U.S.A. |
| PROF. B. FRANCK, | Organisch-Chemisches Institut, | Universitat Munster, | 44 Munster, | WEST GERMANY. |
| DR. A.J. FREY, | Sandoz Pharmaceuticals, | State Highway No. 10, | Hanover, N.J. 07936, | U.S.A |
| PROF. H.L. GOERING, | Department of Chemistry, | University of Wisconsin, | Madison, Wisconsin 53706, | U.S.A. |
| DR. L. GOLDMAN, | Lederle Laboratories, | Pearl River, | N.Y. 10965, | U.S.A. |
| DR. G. HARDTMANN, | Sandoz Pharmaceuticals, | Route No. 10, | Hanover, N.J. 07956, | U.S.A. |
| PROF. W. HERZ, | Department of Chemistry, | Florida State University, | Florida 32306, | U.S.A. |
| PROF. J .N. HUFFMAN, | Department of Chemistry, | Clemson University, | Clemson, SC. 29631, | U.S.A. |
| DR. G.E.M. HUSBANDS, | Wyeth Laboratories | Box 8299, | Philadelphia, Pa. 19101, | U.S.A. |
| PROF. A.S. KENDE, | Department of Chemistry, | University of Rochester, | Rochester, N.Y. 14627 | U.S.A. |
| PROF. S.M. KUPCHAN, | Department of Chemistry, | University of Virginia, | CHARLOTTESVILLE, 22901, | U.S.A. |
| PROF. J.P. KUTNEY, | Department of Chemistry, | University of British Columbia, | Vancouver 8, B.C. | Canada. |
| PROF. T.J. MABRY, | Department of Botany, | The University of Texas, | Austin, Texas 78712, | U.S.A. |
| PROF. S. MCLEAN, | Department of Chemistry, | University of Toronto, | Toronto 5, Ontario, | CANADA. |
| PROF. J.A. MARSHALL, | Department of Chemistry, | Northwestern University, | Evanston, Illinois. 60201, | U.S.A. |
| PROF. H. MUXFELDT, | Department of Chemistry, | Cornell University, | Ithaca, N.Y. 14850, | U.S.A. |
| PROF. A.R. PINDER, | Department of Chemistry, | Clemson University, | Clemson, S.C. 29631, | U.S.A. |
| DR. E. PREMUZIC, | The New England Institute, | P.O. Box 508, Ridgefield, | Conn. 06877, | U.S.A. |
| DR. J.W. ROWE, | U.S. Forest Products, | Products Laboratory, | Madison, Wis. 53705, | U.S.A. |
| PROF. C.A. SALEMINK, | Organisch Chemisch Laboratorium, | Universitat te Utrecht, | Crosesestraat 79, UTRECHT, | HOLLAND. |
| PROF. H.E. SCHMID, | Organisch Chemisches Institut, | Universitat Zurich, | Ramistrasse 76, 8001 Zurich, | SWITZERLAND. |
| PROF. A.I. SCOTT, | Sterling Chemical Laboratory, | Yale University, | 225 Prospect Stt, New Haven, Conn. 06520, | U.S.A. |
| PROF. I.D. SPENSER, | Department of Chemistry, | McMaster University, | Hamilton, Ontario, | CANADA. |
| PROF. C.L. STEVENS, | Department of Chemistry, | Wayne State University, | Detroit, Michigan 48202, | U.S.A. |
| PROF. G.H. STOUT, | Department of Chemistry, | University of Washington, | Seattle, Washington 98105, | U.S.A. |
| PROF. W.A. SZAREK, | Department of Chemistry, | Queen's University, | Kingston, Ontario, | CANADA. |
| PROF. B.M. TROST, | Dcpartment of Chemistry, | University of Wisconsin, | 1101 University Ave, Madison, Wis. 53706, | U.S.A. |
| DR. E.R. VOGT, | The Squibb Institute for Medical Research, | New Brunswick, | New Jersey 08903, | U.S.A. |
| PROF. H.E. WASSERMAN, | Department of Chemistry, | Yale University, | New Haven Conn. 06520, | U.S.A. |
| PROF. L. WEILER, | Department of Chemistry, | University of British Columbia, | Vancouver 8, B.C., | CANADA. |
| DR. U. WEISS, | Building 2, Room B-14, | National Institute of Health, | Bethesda, Maryland 20014, | U.S.A. |
| DR. J.W. WESTLEY, | Hoffman-La Roche Inc., | Nutley. | New Jersey 07110, | U.S.A. |
| PROF. W.B. WHALLEY, | The School of Pharmacy, | University of London, | 29/39 Brunswick Square, London, W.C. 1, | ENGLAND. |
| PPOF. W.C. WILDMAN, | Department of Chemistry, | Iowa State University, | Ames, Iowa 50010, | U.S.A. |
| DR. C.Z. WILLIS, | Lever Brothers Company, | 45 River Road, | Edgewater, New Jersey 07047, | U.S.A. |
| DR. R.E. WILLIAMS, | Biochemistry Laboratories, | National Research Council, | Ottawa 7, Ontario, | CANADA. |
| PROF. P. YATES, | Department of Chemistry, | University of Toronto, | Toronto 5, | CANADA. |
| PROF. F. ZIEGLER, | Sterling Chemistry Laboratory, | Yale University, | 225 Prospect St, New Haven, Conn. 06520 | U.S.A. |