CHEMICAL CONSTITUENTS OF THE ROOTS OF Erythrina subumbrans

摘要

In our continuous interest in the constituents of Erythrina subumbrans Merr. (Leguminosae)[1-3], we chose its roots for the first time for phytochemical investigation. In this paper, we report the isolation of 22 compounds, among which are nine рtеrосаrpаns: orientanol В (1) [4], phaseollin (2) [5], erythrabyssin II (3) [4], phaseollidin (4) [6], erycristagallin (5) [7], erystagailin A(6) [8], eryvarin D (7) [9], erythrabyssin A (8) [10], and erythrabissin I (9) [6]; three isoflavones: scandenone (10) [11], bidwillon С (11) [12], and wighteone (12) [ 13,14]; two 2-atylbenzofurans: bidwillol В (13) [12] and eryvarin L (14) [15]; two steroids: a mixture of β-sitosterol (15) and stigmasterol (16) [16]; two triterpenes: sophoradiol (17) [17,18] and soyasapogenol В (18) [18-20]; one coumestan; sigmoidin К (19) [21]; one chromen-4-one: eryvarin X (20) [22]; one chalcone: isobavachalcone (21) [23]; and coniferaldehyde (22) [24]. These compounds were identified by comparison of their physical and spectroscopic data with reported data. Compounds 1, 4, 7, 8, 11-14, and 19-22 were found for the first time from this species.