1,2,3-Propanetriol, 1,3-di(2-methyl-2-propenoate) 141681-57-4 1830-78-0 2-Hydroxy-1,3-propanediyl bismethacrylate 2-PROPENOIC ACID, 2-METHYL-, 2-HYDROXY-1,3-PROP* 2-Propenoic acid, 2-methyl-, 2-hydroxy-1,3-propanediyl ester EINECS 217-388-4