Answers are grounded in this paper and cite their sources.
A new hexacyclic iboga-type indole alkaloid, voacangalactone (1), was isolated from Voacanga africana , and its structure including the absolute configuration was established by asymmetric total synthesis involving such key steps as the asymmetric Diels-Alder reaction using an aminodiene and the construction of an isoquinuclidine ring and an indole skeleton.
No takes yet. Share an insight, caveat, or question.
Harada et al. (2012) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: