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Heroin Chemistry
by Erowid

NAME :Diacetylmorphine
CHEMICAL NAME :(5alpha,6alpha)-7,8-Didehydro-4,5-epoxy-17-methylmorphinan-3,6-diol diacetate (ester)
ALTERNATE CHEMICAL NAMES : heroin, diamorphine, acetomorphine
MELTING POINT243-244° (hydrochloride monohydrate-fine crystals)
From the Merck Index 12th Edition

Heroin Molecule