Abstract
Four new chemical constituents including one naphthalene derivative, named calotropnaphthalene, two terpene derivatives, namely calotropises juiterpenol and calotropisesterterpenol and an aromatic product designated as calotropbenzofuranone along with a known compound, sucrose, have been isolated from the roots of the Calotropis gigantea. The structures of these chemical constituents have been established as 1-methoxy-4-ethyl naphthalene, 6-(2-methyl-2, 3-dihydroxypenty1)-11, 11-dimethyl cyclohex-8-ene-10-one-7-oic isopentenyl ester, 14-(15, 15-dimethyl cyclohexanyl-14, 19, 25-tricyclo)- 3,7,11-trihydroxymethylene-tridecane and 8,15-dihydro benzofuranyl-18-hepta-7,15-dione-16-oic acid, respectively, on the basis of the spectral data analyses and chemical reactions.
