Nitrophenylgalactosides

Formula : C12-H15-N-O8
CAS : 28347-45-7 

Includes ortho-, meta-, and para-nitrophenylgalactosides.

Nitroprusside

Formula : C5-Fe-N6-O
CAS : 15078-28-1 

A powerful vasodilator used in emergencies to lower blood pressure or to improve cardiac function. It is also an indicator for free sulfhydryl groups in proteins.