SUMMARY The structure previously proposed for methyl jasmonate (methyl cis-Z-pent-2'- en yl-3-oxo-cyclopentylacetate, an odoriferous component of jasmine oil) has been proved by synthesizing the dihydro-derivative, viz. methyl 2-pentyl-3-0x0-cyclo- pentylacetate. Institut de Riologie Physico-Chimique, Paris ... 82. Synthhses du D,L-jasmonate de mkthyle (cis-penthne-2'-yl-2- oxo-3-cyclopentylac~tate ... Un MCmoire prCcCdent relate l'isolement d'un nouveau ...