Abstract
From whole plants of Linaria japonica, four iridoid esters of d-glucopyranose were isolated. Iridolinaroside A is an iridoid ester on the 1-position of β- d-glucopyranose, while iridolinarosides B-D are esters between two units of the same iridoid moiety and one molecule of d-glucopyranose. Since two iridoid moieties were esterified onto non-anomeric hydroxyl groups, iridolinarosides B-D were isolated as an anomeric mixture.
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