In the title compound, C(20)H(28)O(4), a diterpenoid isolated from the roots of Premna obtusifolia (Verbenaceae), the five-membered ring is in a half-chair conformation. One six-membered ring exists in a twisted-boat conformation while the other is in half-boat conformation. The crystal packing is stabilized by inter-molecular O-H⋯O and weak C-H⋯O inter-actions, generating (001) sheets.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3009237 | PMC |
| http://dx.doi.org/10.1107/S160053681004208X | DOI Listing |
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