Definition: The word '537687. 866039-21-6; 3-[4,6-dimethyl-3-(1H-pyrrol-1-yl)thieno[2,3-b]pyridin-2-yl]-1-(3,5-dimethylphenyl)urea' translates to '707394. 887609 - 39-6; 3-[4,6-dimethoxy-3-hydroxyphenylthiouracil]2-[4,6-dimethylthieno[2,3-b]pyridin-2-yl]-1-(3,5-dimethylphenyl)urea'.