. "4-cyclopropylmethyl-10,17-dihydroxy-(13R,17S)-12-oxa-4-azapentacyclo[9.6.1.01,13.05,17.07,18]octadeca-7(18),8,10-trien-14-one(Naltrexone)" . "Naltrexone" . . . . . . . . . . .