The present invention is directed to compounds of Formula I: and pharmaceutically acceptable salts, prodrugs, solvates, hydrates, tautomers, or isomers or thereof, wherein R1, R2, R2’, L, X, W, Y1, Y2, Y3, and Y4 are described herein.本發明係針對式I化合物:及其醫藥學上可接受之鹽、前藥、溶劑合物、水合物、互變異構體或異構體,其中R1、R2、R2'、L、X、W、Y1、Y2、Y3及Y4係在本文中描述。