N-o-hydroxybenzyl-2,3-dimethylmaleamic acid N-o-hydroxybenzylamine salt

3,4-dimethyl-1-(pyridin-4-yl)-1H-pyrrole-2,5-dione

3,4-dimethyl-N-(2-pyridyl)maleinimid

马来酸酐

2-苯胺基吡啶