Synonyms: Formosanan-16-carboxylicacid, 11,12-dimethoxy-19-methyl-2-oxo-, methyl ester, (3b,19a,20a)-; Elegantissine; Herboxine;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-6,7-dimethoxy-1'-methyl-2-oxo-, methylester, [1'S-(1'a,4'aa,5'ab,6'b,10'aa)]-