Thionupharoline has been shown to be identical with 6-hydroxythiobinupharidine. The hydride reduction of hemiaminals of thiobinupharidine has been examined in ethanol solution. The steric course of reduction at C-6 is not nearly as selective as it has been reported to be in solution in methanol.

A new alkaloid, nupharolutine, (C,,H,,NO,) has been isolated from the basic extract of the rhizomes of Nuphar lureum. By spectroscopic and chemical methods it is shown to be a hydroxy derivative of deoxynupharidine. The mass spectra of the new base and several isomers are reported.

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