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(±)-Jasmonic acid-d₅ is intended for use as an internal standard for the quantification of jasmonic acid by GC- or LC-MS. Jasmonic acid (JA) is a plant growth regulator and derivative of α-linolenic acid that can exist in four stereoisomeric forms.^1,2 (–)-3(R),7(R)-JA and (+)-3(S),7(S)-JA have the two side chains in the trans configuration, whereas (–)-3(S),7(R)-JA and (+)-3(R),7(S)-JA have the two side chains in the cis configuration, which can epimerize at C7 to the trans configuration via keto-enol tautomerization.²

(±)-Jasmonic acid-d5 is the deuterium labeled (±)-Jasmonic acid. (±)-Jasmonic acid is a plant growth regulator and a derivative of α-linolenic acid. (±)-Jasmonic acid decreases chlorophyll levels in green and etiolated barley leaf segments and inhibits elongation of rice seedlings.

1. Creelman, R.A., and Mullet, J.E. Biosynthesis and action of jasmonates in plants Annu. Rev. Plant Physiol. Plant Mol. Biol. 48,355-381(1997).
2. Holbrook, L., Tung, P., Ward, K., et al. Importance of the chiral centers of jasmonic acid in the responses of plants. Activities and antagonism between natural and synthetic analogs Plant Physiol. 114(2),419-428(1997).