申请人:KEMPHARM, INC.
公开号:US20200390757A1
公开(公告)日:2020-12-17
The presently described technology provides compositions of one or more of oxoacids, amino acids, polyethylene glycols, and/or vitamin compounds chemically conjugated to levorphanol ((−)-17-methylmorphinan-3-ol) to form novel prodrugs and compositions of levorphanol.