(Triethylammonium) maleate 1069-58-5 121-42-6 121-44-8 2-Butenedioic acid (2Z)-, compd. with N,N-diethylethanamine (1:1) 2-Butenedioic acid (Z)-, compd. with N,N-diethylethanamine (1:1) EINECS 213-960-2 Triethylammonium maleate