The present invention relates to a pyrazolochalcone of formula A useful as potential antitumor agent against human cancer cell lines and a process for the preparation thereof. Formula A wherein, R1, R2, R3, R4, R5=H, Cl, F, CH3, OCH3, 3,4(OCH2O) X=H, Cl, CH3, OCH3, 3,4(OCH2O), NH2, NO2, OH, dotted line indicates optionally cyclic structure.