The present application relates to the technical field of
medicine, and particularly relates to a tri-cyclic
ubiquitin-specific
protease 1 inhibitor compound, a pharmaceutically acceptable salt, an ester, a
deuterium or a stereoisomer thereof, a pharmaceutical composition and preparation containing the compound, the pharmaceutically acceptable salt, the ester, the
deuterium or the stereoisomer thereof, a method for preparing the compound, the pharmaceutically acceptable salt, the ester, the
deuterium or the stereoisomer thereof, and an application of the compound, the pharmaceutically acceptable salt, the ester, the deuterium or the stereoisomer thereof in preparing a
medicine for treating and / or preventing a
disease mediated by USP1 and related diseases.