title: Crystal structure of olivetolic acid: a natural product fromCetrelia sanguinea(Schaer.).
abstract: The title compound, C12H16O4(systematic name: 2,4-dihy-droxy-6-pentyl-benzoic acid) is a natural product isolated fromC. sanguinea(Schaer.) and is reported to have various pharmacological activities. The mol-ecule is approximately planar (r.m.s. deviation for the non-H atoms = 0.096 Å) and features an intra-molecular O-H⋯O hydrogen bond. In the crystal, each olivetolic acid mol-ecule is connected to three neighboursviaO-H⋯O hydrogen bonds, generating (10-1) sheets. This crystal is essentially isostructural with a related resorcinolic acid with a longer alkyl chain.
authors.affiliation: The Laboratory of Natural Resource of Sumatra (LBS) and Faculty of Pharmacy, Andalas University, 26163 Padang, Indonesia.
authors.forename: Friardi
authors.initials: F
authors.lastname: Ismed
authors.affiliation: The Laboratory of Natural Resource of Sumatra (LBS) and Faculty of Pharmacy, Andalas University, 26163 Padang, Indonesia.
authors.forename: Aulia
authors.initials: A
authors.lastname: Farhan
authors.affiliation: The Laboratory of Natural Resource of Sumatra (LBS) and Faculty of Pharmacy, Andalas University, 26163 Padang, Indonesia.
authors.forename: Amri
authors.initials: A
authors.lastname: Bakhtiar
authors.affiliation: The Laboratory of Natural Resource of Sumatra (LBS) and Faculty of Pharmacy, Andalas University, 26163 Padang, Indonesia.
authors.forename: Erizal
authors.initials: E
authors.lastname: Zaini
authors.affiliation: Department of Chemistry and Materials Science, Tokyo Institute of Technology, Ookayama 2-12-1, Meguro-ku, Tokyo 152-8551, Japan.
authors.forename: Yuda Prasetya
authors.initials: YP
authors.lastname: Nugraha
authors.affiliation: Department of Chemistry and Materials Science, Tokyo Institute of Technology, Ookayama 2-12-1, Meguro-ku, Tokyo 152-8551, Japan.
authors.forename: Okky
authors.initials: O
authors.lastname: Dwichandra Putra
authors.affiliation: Department of Chemistry and Materials Science, Tokyo Institute of Technology, Ookayama 2-12-1, Meguro-ku, Tokyo 152-8551, Japan.
authors.forename: Hidehiro
authors.initials: H
authors.lastname: Uekusa
keywords: Cetrelia sanguinea; crystal structure; olivetolic acid