(2R,6S,12bS,13S)-3-Ethylidene-9-hydroxy-1,2,3,7,12,12b-hexahydro-6H-2,6-methano-indolo[2,3-a]quinolizine-13-carboxylic acid methyl ester 975-77-9 AIDS-003044 AIDS003044 Indole alkaloid Pericyclivine Sarpagan-17-oic acid, methyl ester