Title: Albaspidin
CAS Registry Number: 58409-52-2
CAS Name: 2,2¢-Methylenebis[6-butyryl-3,5-dihydroxy-4,4-dimethyl-2,5-cyclohexadien-1-one]
Additional Names: polystichalbin; methylenebis(butyrylfilicinic acid); albaspidin-BB
Molecular Formula: C25H32O8
Molecular Weight: 460.52
Percent Composition: C 65.20%, H 7.00%, O 27.79%
Literature References: Found in the rhizomes of the male fern, Aspidium filix mas (L.) Schott., Dryopteris filix mas (L.) Schott., A. spinulosum, Polypodiaceae and other ferns. Isoln from Aspidium extract: Boehm, Ann. 318, 305 (1901); McGookin et al., J. Chem. Soc. 1953, 1828; see also Tryon et al., Phytochemistry 12, 683 (1973). Isoln as one component of a homologous mixture: Penttila, Sundman, Acta Chem. Scand. 18, 344 (1964). Synthesis: Riedl, Mitteldorf, Ber. 89, 2595 (1956); Inagaki et al., J. Pharm. Soc. Jpn. 76, 1258 (1956). Biosynthetic studies: Penttila, Fales, J. Am. Chem. Soc. 88, 2327 (1966).
Properties: Crystals from ethanol or methanol, mp 149°. Freely sol in chloroform; moderately sol in ether, benzene; sparingly sol in alc, acetone, glacial acetic acid, sol in KOH solns; very sparingly sol in Na2CO3 solns. Practically insol in methanol.
Melting point: mp 149°

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