Abstract
The title compound (AME; systematic name: 3,7-dihydroxy-9-methoxy-1-methyl-6H-benzo[c]chromen-6-one), C15H12O5, was isolated from an endophytic fungi Alternaria sp., from Catharanthus roseus (common name: Madagascar periwinkle). There is an intramolecular O—H⋯O hydrogen bond in the essentially planar molecule (r.m.s. deviation 0.02 Å). In the crystal, the molecule forms an O—H⋯O hydrogen bond with its centrosymmetric counterpart with four bridging interactions (two O—H⋯O and two C—H⋯O). The almost planar sheets of the dimeric units thus formed are stacked along b axis via C—H⋯π and π–π contacts [with C⋯C short contacts between aromatic moieties of 3.324 (3), 3.296 (3) and 3.374 (3) Å].
Highlights
The title compound (AME; systematic name: 3,7-dihydroxy-9methoxy-1-methyl-6H-benzo[c]chromen-6-one), C15H12O5, was isolated from an endophytic fungi Alternaria sp., from
The almost planar sheets of the dimeric units formed are stacked along b axis via C—H and – contacts [with C C short contacts between aromatic moieties of 3.324 (3), 3.296 (3) and
Symmetry codes: (i) −x+2, −y+1, −z+2; (ii) x, y+1, z+1; (iii) −x+2, −y, −z+1
Summary
R factor = 0.033; wR factor = 0.096; data-to-parameter ratio = 11.2. The title compound (AME; systematic name: 3,7-dihydroxy-9methoxy-1-methyl-6H-benzo[c]chromen-6-one), C15H12O5, was isolated from an endophytic fungi Alternaria sp., from. There is an intramolecular O—H O hydrogen bond in the essentially planar molecule (r.m.s. deviation 0.02 Å). The molecule forms an O—H O hydrogen bond with its centrosymmetric counterpart with four bridging interactions (two O—H O and two C—H O). The almost planar sheets of the dimeric units formed are stacked along b axis via C—H and – contacts [with C C short contacts between aromatic moieties of 3.324 (3), 3.296 (3) and
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