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The dried roots of S. chinensis (500 g), which were collectedon Geochang, Korea, were ground and extracted with 95% MeOH (1.5 L ¡¤ 2) at room temperature for
24 h. After filtration andconcen tration, the MeOH extract (75 g) was suspended in H2O and then partitioned with the order of n-hexane, CHCl3, andEtOAc to give three fractions, n-hexane- (9.0 g), CHCl3- (17.0 g), andEtOA c-soluble residue (22.0 g), respectively. The EtOAc-soluble fraction exhibiteda ctivities against hACAT-
1 andhACAT- 2, with 81% and58% inhibition at 100 lg/mL, was subjectedto flash silica gel column chromatography with a gradient of chloroform¨Cmethanol (100:0 to 0:100, v/v) to give five fractions. By bioassay-guided fractionation, the one of active fractions was purifiedby column chromatography on silica gel with a gradient of n-hexane¨Cethyl acetate (3:1 to 2:1, v/v) to obtain the sesquineolignan,  aucerneol B (1) (20 mg). Subsequently, the other active fraction was subjectedto column chromatography on silica gel with a gradient of n-hexane¨Cethyl acetate (1:1 to 1:2, v/v) to give dineolignans, manassantin A (2) (200 mg), and manassantin B (3) (1 g).

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S.chinensis¸ÉÔï¸ù²ÉÓÚº«¹úGeochang,95%¼×´¼1.5lÊÒÎÂÌáÈ¡Á½´Î¸÷24Сʱ¡£¹ýÂ˺óŨËõ£¬75g¼×´¼ÌáÈ¡ÎïÓÃË®»ìÐüºó·Ö±ðÓÃÕý¼ºÍ飬Âȷ£¬ÒÒËáÒÒõ¥ÝÍÈ¡£¬µÃµ½ÌáÈ¡Îï·Ö±ðΪÕý¼ºÍé9g,ÂÈ·Â17g£¬ÒÒËáÒÒõ¥22g.ÒÒËáÒÒõ¥²¿·Ö±íÏÖ³öÇ¿ hACAT-1 ºÍhACAT- 2ÒÖÖÆ»îÐÔ, 100lg/mL·Ö±ðΪ81%ºÍ58%¡£ÒÒËáÒÒõ¥²¿·Ö²ÉÓÿìËٹ轺ÖùÉ«Æ×·¨£¬ÒÔÂÈ·Â-¼×´¼100£º0-0£º100ÌݶÈÏ´ÍÑ£¬µÃµ½5²¿·Ö¡£Í¨¹ýÉúÎï»îÐÔ×·×Ù£¬ÓлîÐÔµÄÒ»²¿·ÖÓù轺Öù´¿»¯£¬Ï´ÍѼÁΪÕý¼ºÍé-ÒÒËáÒÒõ¥3£º1-2£º1.µÃµ½ aucerneol B 20mg.ËæºóÆäËü»îÐÔ²¿·Ö²ÉÓù轺Öù²ãÎöÓÃÕý¼ºÍéÒÒËáÒÒõ¥1£º1-1£º2ÌݶÈÏ´Íѵõ½manassantin A 200mg ºÍmanassantin B 1g.
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