Nerium. I. : Drying Condition of the Leaves of Nerium odorum SOL. (Biological)

Abstract

1. Less polar glycosides such as oleandrin were observed when the fresh leaves of Nerium odorum were dried in an oven at the temperature above 80°, or by incubation of the homogenate of the fresh leaves. More polar glycosides were found in the fresh and air-dried leaves. 2. Oleandrin (0.13%), adynerin (0.035%), odorosid A (0.03%), 16-deacetylanhydrooleandrin (trace), and oleandrigenin (trace) were isolated, together with unknown cardenolides, Subst. III (0.03%) and V (trace), from the oven-dried leaves.