1-oxaspiro[4.5]dec-3-en-2-one, 4-(ethylthio)- 4-(ethylthio)-1-oxaspiro[4.5]dec-3-en-2-one InChI=1/C11H16O2S/c1-2-14-9-8-10(12)13-11(9)6-4-3-5-7-11/h8H,2-7H2,1H