ISSN:
1600-5759
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
A new form of the title compound, ethyl 2,3,6,7-tetrahydro-11-oxo-1H, 5H, 11H-[1]benzopyrano[6,7,8-ij]quinolizine-10-carboxylate, C18H19NO4, was recrystallized from ethanol and is orange in colour. The coumarin moiety is planar and the conformation of the ethoxycarbonyl group is different from that of the yellow form. One of the piperidine rings is disordered and the N atom is in a planar configuration. The crystal packing is governed by van der Waals interactions.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S010827019501239X
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