Answers are grounded in this paper and cite their sources.
The natural (+)-phrymarolin I was stereoselectively synthesized and its absolute configuration was unequivocally determined as being (1S,2S,5R,6S)-1-acetoxy-2-(2-methoxy-4,5-methylenedioxyphenoxy)-6-(2-methoxy-4,5-methylenedioxyphenyl)-3,7-dioxabicyclo[3.3.0]octane.
No takes yet. Share an insight, caveat, or question.
Ishibashi et al. (1988) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: