1 9HB Dimethyl fumarate 1.000 2 EOU Dimethyl (~{E})-but-2-enedioate 1.000 3 AW9 (2z)-4-methoxy-4-oxobut-2-enoic acid 0.727 4 HMB (4s)-4-hydroxy-4-methoxybutanoic acid 0.727 5 MSU Succinic acid monomethyl ester 0.727