These compounds can also be used for aiding in the determination of oxazolidinone binding sites within mammalian cells. [0006] The compounds of the present invention comprise Formula I shown below. [0007] wherein X and Y are, independently, F, H or CH3; R1 is H or I; R2 is H or OH; R3 is H or C1-C8 alkyl; L is a bond or ???OCH2C(???O); and Q is [0008] wherein R4 is H, CH3, CH2CH3 or cyclopropyl; a