M. L. Marino

Occurrence of non-basic metabolites in Amaryllidaceae

Abstract Narciclasine and margetine, previously extracted from many species of the genus Narcissus , are also present in the genera Galanthus , Haemanthus , Leucojum , Pancratium , Sprekelia , Sternbergia and Vallota . In the genus Hymenocallis only margetine was detected, but not narciclasine. Both products are absent in the genera Amaryllis , Clivia , Crinum and Nerine .

A diterpene, distanol, from Sideritis distans

Abstract A new diterpene, distanol, has been isolated from the petrol extract of the aerial part of Sideritis distans Wild. Its structure stereochemistry has been assigned by spectroscopic methods.

Cyclic carbonates formed during performic acid oxidation of atractyligenin

Abstract The performic oxidation of the kaurenic double bond of atractyligenin and derivatives affords cyclic carbonates between the 15α-OH and 16α-OH or the 16α-OH and 17-OH. Their formation is quite unusual and novel for natural substrates.