Osthole
Title: Osthole
CAS Registry Number: 484-12-8
CAS Name: 7-Methoxy-8-(3-methyl-2-butenyl)-2H-1-benzopyran-2-one
Additional Names: 7-methoxy-8-(3-methyl-2-butenyl)coumarin; 8-(3-methyl-2-butenyl)herniarin
Molecular Formula: C15H16O3
Molecular Weight: 244.29
Percent Composition: C 73.75%, H 6.60%, O 19.65%
Literature References: From rhizome of Peucedanum ostruthium (L.) Koch (Imperatoria ostruthium L.) Umbelliferae: Herzog, Krohn, Arch. Pharm. 247, 553 (1909); Butenandt, Marten, Ann. 495, 187 (1932); from Prangos pabularia Lindl., Umbelliferae: Pigulevskii, Kuznetsova, Dokl. Akad. Nauk SSSR 61, 309 (1948), C.A. 43, 3416d (1949); from Flindersia bennettiana F. Muell., Rutaceae: Galbraith et al., Aust. J. Chem. 13, 427 (1960). Structure: Späth, Pesta, Ber. 66, 754 (1933). Synthesis: Späth, Holzen, ibid. 67, 264 (1934); Murayama et al., Chem. Pharm. Bull. 20, 741 (1972).
Properties: Prisms from ether. mp 83-84°. uv max: 322, 258 nm (e 8000, 4300). Practically insol in water; sol in aq alkalies, alcohol, chloroform, acetone, boiling petr ether.
Melting point: mp 83-84°
Absorption maximum: uv max: 322, 258 nm (e 8000, 4300)

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