From the fresh roots of Trichosanthes bracteata VOIGT., the following substances were identified : methyl palmitate, palmitic acid, suberic acid, α-spinasterol, stigmast-7-en-3β-ol, α-spinasterol 3-O-β-D-glucopyranoside, stigmast-7-en-3β-ol 3-O-β-D-glucopyranoside, glyceryl 1-palmitate, glyceryl 1-stearate, bryonolic acid, cucurbitacin B, isocucurbitacin B, 3-epi-isocucurbitacin B, 23, 24-dihydrocucurbitacin B, 23, 24-dihydroisocucurbitacin B, 23, 24-dihydro-3-epi-isocucurbitacin B, cucurbitacin D, isocucurbitacin D and D-glucose. This root contains more than 6 times cucurbitacin of the root of T. kirilowii MAXIM. var. japonicum KITAM.
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