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4a-乙基-4a,5,6,7,10,15-六氫-2H,9H-吲哚[2,3-a]吡喃酮[3,2-i]喹嗪-3,3(4H)-二羧酸二乙酯
Diethyl 4a-ethyl-4a,5,6,7,10,15-hexahydro-2H,9H-indolo[2,3-a]pyrano[3,2-i]quinolizine-3,3(4H)-dicarboxylate

長春西汀及其中間體
Vinpocetine and its intermediates

(研發中)