A tricycle compound-polymer conjugate including a conjugate comprising a tricyclo compound and an alkyl substituted polylactide compound is provided. A pharmaceutical composition comprising the conjugate is also provided.本發明係提供一種三環化合物-聚合物接合物,其包括包含三環化合物與經烷基取代之聚乳交酯化合物之接合物。亦提供一種包含該接合物之醫藥組成物。