Spectinomycin Hydrochloride: C~14~H~24~N~2~O~7~ 2HCl 5H~2~O. Mw: 495.35. (1) 4H-Pyrano[2,3-b][1,4]benzodioxin-4-one, decahydro-4a,7,9-trihydroxy-2-methyl-6,8-bis(methylamino)-, dihydrochloride, pentahydrate; (2) Decahydro-4a,7,9-trihydroxy-2-methyl-6,8-bis(methylamino)-4H-pyrano[2,3-b][1,4]benzodioxin-4-one dihydrochloride pentahydrate. CAS-22189-32-8; CAS-21736-83-4 (anhydrous); CAS-1695-77-8 (spectinomycin)(1962).