(2Z)-but-2-ene-1,4-diyl diacetate 2-butene-1,4-diol, diacetate, (2Z)- InChI=1/C8H12O4/c1-7(9)11-5-3-4-6-12-8(2)10/h3-4H,5-6H2,1-2H3/b4-3