Polyoxygenated cyclohexane derivatives and other constituents from Kaempferia rotunda L.

Extracts of Kaempferia rotunda rhizomes yielded seven compounds; (−)-6-acetylzeylenol (1), four acylated derivatives of 1-benzyloxymethyl-1,6-epoxycyclohexan-2,3,4,5-tetrol (3-6), a Diels-Alder adduct of 3-benzoyl-1-benzoyloxymethylcyclohexa-4,6-dien-2,3-diol (7) and a triacylated derivative of salicin (9). Compound 6 and (−)-zeylenol (2) showed antifeedant activity against Spodoptera littoralis.