Furo(3',4':6,7)naphtho(2,3-d)-1,3-dioxol-6(5aH)-one, 5,8,8a,9-tetrahydro-5-(4-hydroxy-3,5-dimethoxyphenyl)-9-((4,6-O-(1-methyl-4-piperidinylidene)-beta-D-glucopyranosyl)oxy)-, hydrochloride, (5R-(5alpha,5abeta,8aalpha,9beta))-