organic compounds
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In the title compound, C21H24N2O3 [systematic name: methyl (20α)-16,17-didehydro-19α-methyl-18-oxayohimban-16-carboxylate], the molecule adopts an L-type conformation. The crystal packing is governed by one N—Hπ and one C—Hπ interactions. The crystal cohesion is ensured by intermolecular van der Waals contacts [shortest OO contact = 3.199 (2) Å].