Synonyms: Thieno[2,3-d]pyrimidin-4(1H)-one,2,3-dihydro-3-(2-propenyl)-2-thioxo- (9CI);3-(prop-2-en-1-yl)-2-thioxo-2,3-dihydrothieno[2,3-d]pyrimidin-4(1H)-one;3-Allyl-2-sulfanylthieno[2,3-d]pyrimidin-4(3H)-one;thieno[2,3-d]pyrimidin-4(3H)-one, 2-mercapto-3-(2-propen-1-yl)-;