Studies on physiologically active substances in citrus fruit peel. Part XVIII. Structures of new limonoid glycosides in lemon (Citrus limon Burm. f.) peelings.

Two limonoid glycosides were isolated from lemon peel, and their structures were established on the basis of FAB-MS data, 2D-NMR spectroscopic data, and chemical evidence to be ichangin 4-β Jglucopyranoside (1) and nomilinic acid 4-β-glucopyranoside (2). In the present study, compounds 1 and 2 are shown to be new limonoid glycosides.