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Laha, Joydev K.; Gulati, Upma; Malik, SAIMA; Gupta, Anjali; Indurthi, Harish Kumar . (2020). Improved, gram-scale synthesis of sildenafil in water using arylacetic acid as the acyl source in the pyrazolo[4,3-d]pyrimidin-7-one ring formation. New Journal of Chemistry, (), 10.1039.D0NJ01236Jā€“. doi:10.1039/D0NJ01236J 
10.1039/D0NJ01236J