(1R,2R)-Ethyl 1-azido-2-hydroxy-2,3-dihydro-1H-pyrrolo[1,2-a]indole-9-carboxyl­ate

The crystal structure of the title compound, C₁₄H₁₄N₄O₃, confirms both the sites of attachment and the trans arrangement of the hydroxy and azide substituents, and reveals intermolecular hydrogen bonding between OH and C=O units, resulting in a chain of molecules along the b axis.