Synonyms: Formosanan-16-carboxylicacid, 19-methyl-2-oxo-, methyl ester, (3b,7a,19a,20a)-; Speciophylline (7CI,8CI); NSC 113094;Speciophyllin;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'a,4'aa,5'ab,6'a,10'aa)]-; Uncarin D; Uncarine D