2-heptenoic acid, 7-hydroxy-5-methyl-, ethyl ester, (5S)- InChI=1/C10H18O3/c1-3-13-10(12)6-4-5-9(2)7-8-11/h4,6,9,11H,3,5,7-8H2,1-2H3/b6-4+/t9-/m0/s ethyl 7-hydroxy-5-methylhept-2-enoate