The molecule is a diphenyl ether (two benzene rings linked by an O).

1. Ring A (one side of the ether):
   - Place Cl at the carbon orhto to O.  
   - Place a methyl at the carbon meta to O and para to the Cl.  

2. Ring B (the other side of the ether):
   - Attach a 1-hydroxypropyl group at the carbon para to O, i.e., a three-carbon chain attached at the first carbon with a hydroxyl group.