title: Structure Revision of Two Polyoxygenated Sterols from the Marine Sponge Neofibularia nolitangere.
abstract: Careful reexamination of the published 1H- and 13C-NMR spectral data of (24S)-24-ethylcholest-8-ene-3β,5α,6β,7α-tetraol (1) and (24S)-24-ethylcholest-8(14)-ene-3β,5α,6β,7α-tetraol (2), isolated from the marine sponge Neofibularia nolitangere, indicates that, in reality, compounds 1 and 2 are (24S)-5α,6α- epoxy-24-ethylcholest-8-ene-3β,7α-diol (9) and (24S)-5α,6α-epoxy-24-ethylcholest-(14)-ene-3β,7α-dio (10), respectively.
authors.forename: Yasunori
authors.initials: Y
authors.lastname: Yaoita
authors.forename: Masao
authors.initials: M
authors.lastname: Kikuchi
authors.forename: Koichi
authors.initials: K
authors.lastname: Machida
mesh_terms: D000818:Animals; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D011161:Porifera / Q000737:chemistry*; D013261:Sterols / Q000737:chemistry*
chemical_list: D013261:Sterols