Studies on the constituents of asclepiadaceae plants. LI. Oxidation at the 18-methyl group of C/D-cis-pregnane type steroids and 13C-nuclear magnetic resonance spectra of 18-oxygenated pregnanes and related compounds.
Studies on the constituents of asclepiadaceae plants. LI. Oxidation at the 18-methyl group of C/D-cis-pregnane type steroids and 13C-nuclear magnetic resonance spectra of 18-oxygenated pregnanes and related compounds.