Crystalline 6,7-unsaturated-7-carbamoyl morphinane derivative, and method for producing same

摘要

H:Vbr/Interwoven/NRPortbl/DCC/RBR/8333683_I.docx-28/08/2015 Stable crystalline forms of a compound represented by the formula (IA): -HO HIN- NOA / -N (IA) 5 , an acid addition salt, and/or a solvate thereof are provided by the present invention. Said crystalline forms are extremely useful as materials for preparing medicines. Novel processes for preparing 6,7-unsaturated-7-carbamoyl morphinan derivatives are also provided by the present invention.