Abstract
The phenolic components of the fresh subterranean part and rhizome of Aloe saponaria HAW. were examined to give new four bianthraquinoid pigments A (I), B (II), C (III) and D (IV). On the basis of the spectral and chemical evidences the structures of these compounds were established to be (+)-asphodelin (I), 1, 1', 8, 8', 10-pentahydroxy-3, 3'-dimethyl-10, 7'-bianthracene-9, 9', 10'-trione (II), 1, 1', 8, 8'-tetrahydroxy-3, 3'-dimethyl-4, 7'-bianthracene (10'H, 10'H)-9, 9', 10-trione (III) and 1, 1', 8, 8', 10-pentahydroxy-3, 3'-dimethyl-10, 7'-bianthracene (10'H, 10'H)-9, 9'-dione (IV).
