<p>63 - DIHYDROPYRAZOLOPYRIMIDINONE DERIVATIVES ABSTRACT THE INVENTION RELATES TO COMPOUNDS OF A GENERAL FORMULA (1): R1 2 R RS R6 0 AL H WHEREIN AI IS SELECTED FROM THE FOLLOWING FORMULA (AAL): -N /--J NR'C -CNR'C (AAL RI IS A LOWER ALKENYL GROUP OR A LOWER ALKYNYL GROUP; R2 IS A PHENYL, PYRIDYL OR THIENYL GROUP; R5 AND R6 ARE A HVDROGEN ATOM, A LOWER ALKYL 10 GROUP OR A HYDROXY-LOWER ALKYL GROUP, ETC. 'ME COMPOUNDS OF THE INVENTION HAVE EXCELLENT WEEL KINASE-INHIBITORY EFFECT AND ARE THEREFORE USEFUL IN THE FIELD OF MEDICINES, ESPECIALLY TREATMENT OF VARIOUS CANCERS. (NO</p>
