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Medical Definition of Hydrocotarnine
1. 5,6,7,8-Tetrahydro-4-methoxy-6-methyl-1,3-dioxolo[4,5-g]isoquinoline;an alkaloidal principle derived from cotarnine; it is the basic hydrolytic product of narcotine; also obtained from the mother liquors of thebaine. (05 Mar 2000)