Tannins and related compounds. XCVI. Structures of macaranins and macarinins, new hydrolyzable tannins possessing macaranoyl and tergalloyl ester groups, from the leaves of Macaranga sinensis (Baill.) Muell.-Arg.
作者:Jer-Huei LIN、Makoto ISHIMATSU、Takashi TANAKA、Gen-ichiro NONAKA、Itsuo NISHIOKA
DOI:10.1248/cpb.38.1844
日期:——
Together with eleven known compounds (1-11), seven new tannins, 3-desgalloylterchebin (12), macaranins A, B and C, and macarinins A, B and C, have been isolated from the leaves of Macaranga sinensis (BAILL.) MUELL.-ARG. (Euphorbiaceae). Macaranins A (14), B (13) and C (17) have been determined on the basis of chemical and spectroscopic evidence to be hydrolyzable tannins possessing a novel acyl group (macaranoly group) at the 3, 6-positions of the 1C4 (or skew boat) β-D-glucopyranose ring, while macarinins A (18), B (15) and (16) were characterized as those having a tergalloyl group at the same positions.
与已知的十一种化合物(1-11)一起,从Macaranga sinensis (BAILL.) MUELL.-ARG.(大戟科)的叶子中分离出了七种新单宁,分别为3-desgalloylterchebin(12)、macaranins A、B和C。根据化学和光谱证据,确定macaranins A(14)、B(13)和C(17)为可水解的单宁,具有在1C4(或倾斜船型)β-D-葡萄糖环的3、6位上的新型酰基(macaranoly基团),而macarinins A(18)、B(15)和C(16)被鉴定为在相同位置具有tergalloyl基团的化合物。