Urotensin II

Formula : C62-H84-N14-O17-S2
CAS : 9047-55-6 

Inhibits active chloride transport by the skin of marine teleost in contrast to urotensin I which stimulates it.

Urovalidin

Formula : C14-H14-N4-O4.C11-H11-N5
CAS : 78891-95-9 

Combination drug for urinary tract infections; contains 300 mg terizidone & 50 mg phenazopyridine.