Satisfactory niicroanalyses obtained: C _-l_-0.35. H it) _3_t,('I 4-0, 20, N it| _4| _\'\ $¢ cius oil isolated by chromatography on silica gel: identical with an authentic sample “. Reaction at room tetiiperaturebeca use of poor solubility of ititerinedi-ate 2. Product isolated by chromatography on deactivated silica gel ClullflgrwllhtIlli; hlOl'Ul'l1t3ll1£ lI] GjIl'lClh '£ lIlQl,:'att 'lIYl011lit'&tll (l recrystallized lrom (. ilCl'] l0l" Om ('lh'¢ tllU/It-DCl 'llZit '| C; mp. 142' ...