Lichens and fungi. Part XIII. Comparison of the nuclear magnetic resonance and mass spectra of 17,21-secohopane and 17,21-secoflavicane derivatives
Abstract
N.m.r. and mass spectral data for derivatives of 17,21-secohopane and 17,21-secoflavicane provide supporting evidence for the structure proposed for flavicane, rings C, D, and E of which are considered to be antipodally related to rings C, D, and E of 21 α-Hhopane.