Houdi, A. ., Kottayil, S. ., Crooks, P. ., & Butterfield, D. . (1996). 3-O-acetylmorphine-6-O-sulfate: a potent, centrally acting morphine derivative. Pharmacology, Biochemistry, and Behavior, 53(3), 665-71. https://doi.org/10.1016/0091-3057(95)02067-5