Ontology highlight
ABSTRACT:
SUBMITTER: Poplevin DS
PROVIDER: S-EPMC5050770 | biostudies-literature | 2016 Oct
REPOSITORIES: biostudies-literature
Acta crystallographica. Section E, Crystallographic communications 20160916 Pt 10
The isomeric title compounds, C<sub>12</sub>H<sub>13</sub>NO<sub>4</sub> (I<i>a</i>) and C<sub>12</sub>H<sub>13</sub>NO<sub>4</sub> (II<i>a</i>), the products of an usual thermal C6-epimerization of 5-oxo-1,2,3,5,5a,6,7,9b-octa-hydro-7,9a-ep-oxy-pyrrolo-[2,1-<i>a</i>]iso-indole-6-carb-oxy-lic acid, represent the two different diastereomers and have very similar mol-ecular geometries. The mol-ecules of both compounds comprise a fused tetra-cyclic system containing four five-membered rings (pyrrol ...[more]