(2), (2′S,3′R)-3α-(2′,3′-epoxyangeloyloxy)-kaur-16-en-19-oic acid (3) and (2′R,3′S)-3α-(2′,3′-epoxyangeloyloxy)-kaur-16-en-19-oic acid (4), along with eight known diterpenes (5−12), were isolated from Wedelia prostrata. The absolute configurations of the new structures were determined by X-ray crystallography, ECD calculations and chemical methods. All compounds were evaluated for their cytotoxicity
摘要四个新的手性环氧天使酸酯新的对映
月桂烷二萜,(2'R,3'R)-3α-(2',3'-epoxyangeloyloxy)-kaur-16-en-19-oic acid(1),(2 ′S,3′S)-3α-(2′,3′-环氧angylyloxy)-kaur-16-en-19-oic acid(2),(2′S,3′R)-3α-(2′, 3'-环氧Angeloyloxy)-kaur-16-en-19-oic酸(3)和(2'R,3'S)-3α-(2',3'-epoxyangeloyloxy)-kaur-16-en-19-从Wedelia prostrata中分离出了
油酸(4)和八种已知的二萜(5-12)。新结构的绝对构型是通过X射线晶体学,
ECD计算和
化学方法确定的。评估了所有化合物对人HepG-2细胞的细胞毒性活性,IC50值为11.72±0.22μmol/ L至54.75±1.12μmol/ L。