Answers are grounded in this paper and cite their sources.
Variabilin (1), an antimicrobial furanosesterterpene, has been isolated from an Okinawan marine sponge Amphidmedon sp. and its absolute stereochemistry at the C-18 position was determined as S by synthesis of a degradation product of 1.
No takes yet. Share an insight, caveat, or question.
Ishibashi et al. (1993) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: