MINOR AND TRACE STEROLS IN MARINE INVERTEBRATES 38 : ISOLATION, STRUCTURE ELUCIDATION AND PARTIAL SYNTHESIS OF PAPAKUSTEROL, A NEW BIOSYNTHETICALLY UNUSUAL MARINE STEROL WITH A CYCLOPROPYL-CONTAINING SIDE CHAIN.

Article abstract of DOI:10.1016/S0040-4039(00)81384-2

A new cyclopropyl-containing sterol papakusterol (22-dehydro-24,26-cyclocholesterol), arising by a hitherto unknown biosynthetic process, was isolated from six "deep sea" gorgonians and its structure alucidated by ¹H-NMR analysis and partial synthesis.Traces of the corresponding Δ^5,7-diene have also been encountered.