The sole metabolite showing significant activity During this research was a phenolic derivative hydroxylated within the four-position of the phenylethyl moiety of fentanyl, the exercise of which was discovered to lie involving morphine and pethidine. Determine 1. Chemical structures of fentanyl and reviewed fentanyl analogs with knowledge on metabolism and/or https://hamidg406gzp2.newsbloger.com/profile