(E)Hex-2-enyl hexanoate 53398-86-0 AI3-35968 EINECS 258-519-5 Hexanoic acid, (2E)-2-hexenyl ester Hexanoic acid, 2-hexenyl ester, (E)- trans-2-Hexenyl caproate trans-2-Hexenyl caproate (hexanoate)