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14 - ALKOXYCARBONYL - 3,4 - DEHYDRO - 14,15 - DIHYDRO-14,16 - EBURNAMENINE PERCHLORATES AND THEIR USE TO PREPARE STEREOISOMERS OF DIHYDRO APOVINCAMINIC ACID ESTERS
14 - ALKOXYCARBONYL - 3,4 - DEHYDRO - 14,15 - DIHYDRO-14,16 - EBURNAMENINE PERCHLORATES AND THEIR USE TO PREPARE STEREOISOMERS OF DIHYDRO APOVINCAMINIC ACID ESTERS