Myrophine (Myristylbenzylmorphine) is an opiate analogue that was developed in 1952. It is a derivative of morphine. Myrophine is substituted with a 3-benzyl group and a 6-myristyl chain. It is metabolised to form benzylmorphine and then further to morphine and so is a long-acting prodrug for morphine but with a slow onset of effects.
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