The molecule is based on a pyridine ring (a six-membered aromatic ring with one nitrogen atom). Number the ring with the nitrogen as position 1 and proceed clockwise. Four consecutive ring carbons carry substituents:
- Position 2: methoxy group (-OCH3).  
- Position 3: hydroxy group (-OH).  
- Position 4: trifluoromethoxy group (i.e., a methoxy group in which all three hydrogens are replaced by fluorine).  
- Position 5: carbonyl chloride group, that is, a carbon doubly bonded to an oxygen and singly bonded to a chlorine atom.