Abstract
In the title compound, C17H16O7, which was isolated from the leaves of Micromelum integerrimum, the furan ring adopts an envelope conformation with the O atom as the flap. An intramolecular C—H⋯O hydrogen bond occurs. The carbonyl O atom is disordered in a 0.57 (8):0.43 (8) ratio. In the crystal, molecules are linked by weak C—H⋯O hydrogen bonds into a C(10) chain along [010].
Highlights
C17H16O7, which was isolated from the leaves of Micromelum integerrimum, the furan ring adopts an envelope conformation with the O atom as the flap
Micromelum integerrimum is a shrub in the Rutacae family containing the coumarin molecule, micromelin, as the major chemical constituent (Cassady et al, 1979)
Many coumarins including micromelin have been extracted from Rutacae plants, and for some their cytotoxicity has been investigated (Sripisut et al, 2012; He et al, 2001)
Summary
Natural Products Research Laboratory, School of Science, Mae Fah Luang, University, Tasud, Muang, Chiang Rai 57100, Thailand, bDepartment of Chemistry, University of Hull, Cottingham Road, Hull HU6 7RX, England, and cDepartment of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand. Key indicators: single-crystal X-ray study; T = 298 K; mean (C–C) = 0.004 Å; disorder in main residue; R factor = 0.046; wR factor = 0.136; data-to-parameter ratio = 9.5. C17H16O7, which was isolated from the leaves of Micromelum integerrimum, the furan ring adopts an envelope conformation with the O atom as the flap. An intramolecular C—H O hydrogen bond occurs. The carbonyl O atom is disordered in a 0.57 (8):0.43 (8) ratio. Molecules are linked by weak C—H O hydrogen bonds into a C(10) chain along [010]
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