(+)-(4aR,10bR)-3,4,4a,5,6,10b-Hexahydro-4-propyl-2H-naphth(1,2-b)-1,4-oxazin-9-ol hydrochloride 2H-Naphth(1,2-b)-1,4-oxazin-9-ol, 3,4,4a,5,6,10b-hexahydro-4-propyl-, hydrochloride, (4aR-trans)- 99705-65-4 L 647,339 MK 458 NAXAGOLIDE HYDROCHLORIDE Naxagolide hydrochloride [USAN]