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Examples of iridoids. Iridomyrmecin is found in ants (Iridomyrmex sp), catalpol and loganic acid are found in various plants. The cyclopentane and pyran rings are colored in red and blue, respectively. Carbon-1, on which glycosylation commonly takes place is marked by a red circle. Glc, (β -D)-glucopyranosyl moiety.
