4-[(2E)-4-{4-[(3-Chloro-5-hydroxyphenyl)amino]-5,8-dihydropyrido[4',3':4,5]thieno[2,3-d]-pyrimidin-7(6H)-yl}-4-oxobut-2-en-1-yl]-N,N-dimethylpiperazine-1-carboxamide