Morphinan derivative

摘要

The present invention relates to a morphinan derivative as represented by general formula (I); a tautomer or stereoisomer of said compound; a pharmaceutically acceptable salt thereof; a solvate of the morphinan derivative or of a tautomer, stereoisomer, or pharmaceutically acceptable salt thereof; and an analgesic, an anxiolytic agent, or the like that includes any of the above as an active ingredient. In general formula (I), R