Begin with an ethane skeleton, carbons numbered 1 and 2.

Carbon 1 (C1):
- Bears two hydrogens.  
- Bears Ring A, a benzene ring attached directly to C1. Ring A has two chlorine atoms at both ortho positions relative to the attachment point.

Carbon 2 (C2): tetra-substituted (one hydrogen plus three different groups):  
- The bond to C1 (the ethane linkage).
- A methoxycarbonyl substituent attached directly to C2; methoxycarbonyl is a carboxylic acid derivative, where the carboxyl group (-COOH) where the hydroxyl hydrogen is replaced by a methyl group.
- Ring B, a benzene ring attached directly to C2; Ring B carries one chlorine atom ortho to the attachment point.
- One hydrogen.