One of a class of monoterpenoids biosynthesized from isoprene and often intermediates in the biosynthesis of alkaloids. Iridoids usually consist of a cyclopentane ring fused to a six-membered oxygen heterocycle; cleavage of a bond in the cyclopentane ring gives rise to the subclass known as secoiridoids.
| Member | Definition | Role |
|---|
| 7-deoxyloganic acid | A cyclopentapyran that is 1,4a,5,6,7,7a-hexahydrocyclopenta[c]pyran-4-carboxylic acid substituted at positions 1 and 7 by beta-D-glucosyloxy and methyl groups respectively (the 1S,4aS,7S,7aR-diatereomer). | 7-deoxyloganic acid |
| agnuside | A benzoate ester resulting from the formal condensation of the carboxy group of 4-hydroxybenzoic acid with the primary hydroxy group of aucubin. It is an iridoid glycoside found in several Vitex plants including Vitex agnus-castus. | agnuside |
| asperuloside | A iridoid monoterpenoid glycoside isolated from Galium verum. | asperuloside |
| asperulosidic acid | | Asperulosidic acid |
| didrovaltrate | | Didrovaltratum |
| dolichodial | A dialdehyde that is cyclopentanecarbaldehyde substituted by a methyl group at position 2 and a 3-oxo-prop-1-en-2yl group at position 5. It has been found to occur in pheromones of insects such as aphids. | dolichodial |
| genipin | | Genipin |
| loganin | An iridoid monoterpenoid with formula C17H26O10 that is isolated from several plant species and exhibits neuroprotective and anti-inflammatory properties. | loganin |
| monotropein | An iridoid monoterpenoid that is 1,4a,7,7a-tetrahydrocyclopenta[c]pyran substituted by a beta-D-glucopyranosyloxy group at position 1, a carboxylic acid group at position 4, and at position 7 by a hydroxy and hydroxymethyl groups respectively (the 1S,4aS,7R,7aS diastereomer). | monotropein |
| Shanzhiside methyl ester | | Shanzhiside methyl ester |
| spirodionic acid | | Spirodionic acid |