Acyclic diterpenic constituents from the roots of Calotropis procera (Ait.) R. Br.

Three new terpenic constituents characterized as 3,7,11,15-tetramethyl hexadecanyl 6′-methyl hept-5′-enyl ether (phytyl iso-octyl ether) (1), 2,6,10,14,18-pentamethylnonadecanoyl-β-d-glucopyranosyl-(2 → 1)-β-d-glucopyranosyl-(2 → 1)-β-d-glucopyranoside (procerasesterterpenoyl triglucoside) (3) and 3,7,11,15 tetramethylhexadecanoyl-β-d-glucopyranosyl-(2 → 1)-β-d-glucopyranosyl-(2 → 1)-β-d-glucopyranosyl(2 → 1)-β-d-glucofuranoside (dihydrophytoyl tetraglucoside) (4) have been isolated for the first time from the roots of Calotropis procera (Ait.) R. Br. (Asclepiadaceae) along with the known compound 1,2-dihexadecanoyl-3-phosphatyl glycerol (2). The structures of all these phytoconstituents have been established by spectral data analysis and chemical reactions.