(+)-4-Hydroxysarcocapnine: Structure and stereochemical considerations

Abstract (+)-4-Hydroxysarcocapnine obtained from Sarcocapnos enneaphylla (L.) DC. has been shown by spectral studies and synthesis to possess the new 4-hydroxyisocularine structure (1a). Straightforward assignment of the configuration of a 4-hydroxycularine by NMR is also-discussed.