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  Indian J Med Microbiol
 

Table 2: 1H chemical shift (δ, ppm) of sildenafil citrate and sildenafil base in dimethyl sulfoxide-d6

Table 2: <sup>1</sup>H chemical shift (δ, ppm) of sildenafil citrate and sildenafil base in dimethyl sulfoxide-d<sub>6</sub>