3329-91-7 DIOSCORINE HSDB 3481 NSC 107662 Spiro(2-azabicyclo(2.2.2)octane-5,2'-(2H)pyran)-6'(3'H)-one, 2,4'-dimethyl-, (1R-(1alpha,4alpha,5alpha))- Spiro(2-azabicyclo(2.2.2)octane-5,2'-(2H)pyran)-6'(3'H)-one, 2,4'-dimethyl-, (1R-(1alpha,4alpha,5alpha))- (9CI)