1-{7-[(E)-2-(dimethylamino)vinyl]-3-phenylpyrazolo[1,5-a]pyrimidin-6-yl}ethanone InChI=1/C18H18N4O/c1-13(23)15-11-19-18-16(14-7-5-4-6-8-14)12-20-22(18)17(15)9-10-21(2)3/h4-12H,1-3H3/b10-9 ethanone, 1-[7-[(E)-2-(dimethylamino)ethenyl]-3-phenylpyrazolo[1,5-a]pyrimidin-6-yl]-