the ethylidene side-chain was located at nitrogen atom. The
similar NOESY (Supporting information) and ECD spectro-
scopic data of 2 and 1 (Fig. 4) suggested that their absolute
configurations were identical. Accordingly, the structure of
2 was identified as 5α,2′-dihydroxy-1α,2α-diacetoxycass-
8,11,13(15)-trien-N-ethylidene-16,12-lactam and named
caesalminine B.
the ethylidene side-chain was located at nitrogen atom. Thesimilar NOESY (Supporting information) and ECD spectro-scopic data of 2 and 1 (Fig. 4) suggested that their absoluteconfigurations were identical. Accordingly, the structure of2 was identified as 5α,2′-dihydroxy-1α,2α-diacetoxycass-8,11,13(15)-trien-N-ethylidene-16,12-lactam and namedcaesalminine B.
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