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[en] Highlights: • A new example for high pressure studies on fullerene solvates. • The intercalated CS2 molecules promote the deformation of C60 molecules under pressure. • The stability of CS2 molecules under pressure is significantly enhanced in C60∗CS2 solvates. • The intercalated CS2 molecules can detect the pressure transformation of C60 molecules. High pressure IR study has been carried out on C60∗CS2 solvates up to 34.8 GPa. It is found that the intercalated CS2 molecules significantly affect the transformations of C60 molecules under pressure. As a probe, the intercalated CS2 molecules can well detect the orientational ordering transition and deformation of C60 molecules under pressure. The chemical stability of CS2 molecules under pressure is also dramatically enhanced due to the spacial shielding effet from C60 molecules around in the solvated crystal. These results provide new insight into the effect of interactions between intercalants and fullerenes on the transformations in fullerene solvates under pressure.