1. The core is a five-membered aromatic pyrazole ring, numbered with adjacent nitrogens as N1 and N2, followed by carbons C3, C4, and C5.
- N1 bears an ethyl substituent (-CH2-CH3).
- C4 bears a methoxy group (-O-CH3).
- C5 is linked to a benzene ring via a carbonyl bridge (-C(=O)-).

2. On the attached benzene ring, numbering the carbon directly bonded to the carbonyl as position 1:
- At position 3, the ring bears a chlorine atom.
- At position 4, the ring bears a bromine atom.