A process for the preparation of a compound of formula (I) ** Formula ** in which Ring A and Ring B are one of the following: (1) Ring A is an optionally substituted unsaturated monocyclic heterocyclic ring, and Ring B is an optionally substituted unsaturated monocyclic heterocyclic ring, an optionally substituted unsaturated fused heterobicyclic ring, or an optionally substituted benzene ring； or (2) Ring A is an optionally substituted benzene ring, and Ring B is an optionally substituted unsaturated monocyclic heterocyclic ring, or an optionally substituted unsaturated fused heterobicyclic ring in which Y is linked to the heterocyclic fused heterocyclic ring； or (3) Ring A is an optionally substituted unsaturated fused heterobicyclic ring, in which the sugar fraction X- (sugar) and the fraction -Y- (Ring B) are both in the same heterocyclic ring of the fused heterobicyclic ring, and Ring B is an optionally substituted unsaturated monocyclic heterocyclic ring, an optionally substituted unsaturated fused heterobicyclic ring, or an optionally substituted benzene ring； X is a carbon atom； Y is - (CH2) n-； where n is 1 or 2； provided that in Ring A, X is part of an unsaturated bond； or a pharmaceutically acceptable salt thereof, or a prodrug thereof； that understandsUn proceso para la preparación de un compuesto de fórmula (I)**Fórmula** en la que el Anillo A y el Anillo B son uno de los siguientes: (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 fusionado insaturado opcionalmente sustituido, o un anillo de benceno opcionalmente sustituido； o (2) el Anillo A es un anillo de benceno opcionalmente sustituido, y el Anillo B es un anillo heterocíclico monocíclico insaturado opcionalmente sustituido, o un anillo heterobicíclico fusionado insaturado opcionalmente sustituido en el que Y está ligado al anillo heterocícl
