4-21-00-00327 (Beilstein Handbook Reference) 488-00-6 BRN 0031540 Butanoic acid, 2-hydroxy-2-(1-methoxyethyl)-3-methyl-, (2,3,5,7a-tetrahydro-1H-pyrrolizin-7-yl)methyl ester, (7aS-(7(2R*(S*)),7aR*))- HELEURINE NSC 89940 O(sup 3)-Methylsupinidine