1,2-Bis(allyloxy)benzene 1,2-Diallyloxybenzene 4218-87-5 AI3-10533 Benzene, 1,2-bis(2-propenyloxy)- Benzene, o-bis(allyloxy)- Catechol diallyl ether EINECS 224-156-6 NSC 4213 Pyrocatechol diallyl ether