A compound of formula: ** Formula ** in which ring A and ring B are (1) ring A is an optionally substituted unsaturated monocyclic heterocyclic ring and ring B is an optionally substituted unsaturated monocyclic heterocyclic ring, a ring Optionally substituted unsaturated condensed heterobicyclic or an optionally substituted benzene ring, (2) Ring A is an optionally substituted benzene ring and Ring B is an optionally substituted unsaturated monocyclic heterocyclic ring, an optionally substituted unsaturated condensed heterobicyclic ring, or a ring of optionally substituted benzene, or (3) ring A is an optionally substituted unsaturated condensed heterobicyclic ring, in which the group -NR- and the group -CH2- are both on the same ring of the unsaturated condensed heterobicyclic ring and the ring B it is an optionally substituted monocyclic unsaturated heterocyclic ring, a heterobic ring optionally substituted unsaturated condensed cyclic or an optionally substituted benzene ring； and R is a hydrogen atom, a C1-6 alkyl group, a C1-6 alkanoyl group or a C1-6 alkoxycarbonyl group, or a pharmaceutically acceptable salt thereof； provided that N- [4 - [(4-amino-3-chlorophenyl) methyl] -2-chlorophenyl] -ß-D-glucopyranosylamine is excluded.Un compuesto de fórmula:**Fórmula** en la que el anillo A y el anillo B son (1) el anillo A es un anillo heterocíclico monocíclico insaturado opcionalmente sustituido y el anillo B es un anillo heterocíclico monocíclico insaturado opcionalmente sustituido, un anillo heterobicíclico condensado insaturado opcionalmente sustituido o un anillo de benceno opcionalmente sustituido, (2) el anillo A es un anillo de benceno opcionalmente sustituido y el anillo B es un anillo heterocíclico monocíclico insaturado opcionalmente sustituido, un anillo heterobicíclico condensado insaturado opcionalmente sustituido, o un anillo de benceno opcionalmente sustituido, o (3) el anillo A es un anillo heterobicíclico condensado insaturado opcionalmente sustitu
