1931-62-0 2-Propeneperoxoic acid, 3-carboxy-, 1-(1,1-dimethylethyl) ester, (2Z)- EINECS 217-691-1 MALEIC MONOPEROXY ACID, 1-tert-BUTYL ESTER, not more than 55 in solution OO-tert-butyl monoperoxymaleate