Combinatorial libraries are disclosed which are represented by Formula I:(T'--L).sub.q -- S--C(O)--L'--II' Iwherein: S is a solid support; T'--L-- is an identifier residue; and --L'--II' is a ligand/linker residue. Compounds which contain aryl sulfonamides, N-acyl derivatives, and N-substituted pyrrolidines and piperidines of the formula:Y--A--CO--R.sup.1are inhibitors of serine proteases and carbonic anhydrase isozymes. They are useful in the treatment of hyper-coagulation disease and ocular diseases such as glaucoma.