The title compound, C35H51N, is a semi-synthesized derivative obtained from 4α,14α-dimethyl-5α-cholest-8-en-3β-ol, a major triterpene isolated from Euphorbia officinarum latex. The molecular structure was established by H-1 and C-13 NMR spectroscopy and confirmed as having the stereochemistry at the new C11b stereocenter by single-crystal X-ray diffraction. The planar indole group is folded over the extended tetracyclic perhydrocyclopentanephenanthrene triterpene skeleton. There are no π-π interactions between the indole ring systems.

This work was partially supported by the collaborative Project CSIC–Laboratory of Natural Substances, University Cadi Ayyad, Marrakesh (Morocco).

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