14019-66-0 Methyl 1,2,5',5'a,7',8',10',10'a-octahydro-1'-methyl-2-oxospiro(3H-indole-3,6'(4'aH)-(1H)pyrano(3,4-f)indolizine)-4'-carboxylate (1'S-(1'alpha,4'aalpha,5'abeta,6'beta,10'aalpha))- Spiro(3H-indole-3,6'(4'aH)-(1H)pyrano(3,4-f)indolizine)-4'-carboxylic acid, 1,2,5',5'a,7',8',10',10'a-octahydro-1'-methyl-2-oxo-, methyl ester, (1'S-(1'alpha,4'aalpha,5'abeta,6'beta,10'aalpha))-