Morphine methylbromide (Morphine methobromide, Morphine bromomethylate, Morphosan) a derivative of morphine. It is an opioid listed as a Schedule I Narcotic with an ACSCN of 9305 and a 2014 aggregate national production quota of 5 grams. It is a salt of morphine with a freebase conversion ratio of 0.75.controlled substance.