Phenyl alkyls and citronellyl glucosides from the silk cocoons of Bombyx mori L

Silk cocoons, produced by Bombyx mori L. (Bombicidae) are used to treat heart palpitation, cough, asthma and catarrh. Phytochemical investigation of the cocoons led to the isolation of alkyl substituted dioxymethylene benzene derivatives and two citronellyl glucosides for the first time characterized as n-pentanyl-3,4-(dioxymethylene) benzene (1), n-pentanyl-2,3-dioxymethylene-4-hydroxybenzene (2), n-decanyl-3,4-dioxymethylene-4-hydroxybenzene (3), 3,6,10-trimethyldodecan-1-ol-1β-D-glucopyranoside (4) and 8-hydroxydihydrocitronelloyl-1β-Dglucopyranosyl-(2′→1′′)-β-D-glucuronopyranosyl-2′′-(3′′′-hydroxy-4′′′-acetoxy)benzoate (5) on the basis of spectral data analysis.