(E)-2-Hexenyl propionate (E)-Hex-2-enyl propionate 139729-91-2 2-HEXEN-1-OL, PROPANOATE, (E)- 2-Hexen-1-ol, propanoate, (2E)- 2-Hexenyl propanoate 53398-80-4 AI3-35969 EINECS 258-513-2 FEMA No. 3778 trans-2-Hexenyl propionate