Stat3 degraders and uses thereof

A liquid formulation comprising Compound A, or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable excipient and/or carrier;

• wherein Compound A is (2-(((5S,8S, 10aR)-3-acetyl-8-(((S)-5-amino-1-(2-chloro-3-(4-(((S)-1-((2S,4R)-4-hydroxy-2-(((S)-1-(4-(4-methylthiazol-5-yl)phenyl)ethyl)carbamoyl)pyrrolidin-1-yl)-3,3-dimethyl-1-oxobutan-2-yl)amino)-4-oxobutyl)phenoxy)-5-oxopentan-2-yl)carbamoyl)-6-oxodecahydropyrrolo[1,2-a][1,5]diazocin-5-yl)carbamoyl)-1H-indole-5-carbonyl)phosphonic acid.