<p>If you go to Assist.org, you can see which O-chem class at UCD corresponds to a particular O-Chem class at your CC. For example, I went to Irvine Valley College before I transferred to UC Davis, and the O-Chem series at UC Davis was CHEM 12A and 12B. 12A was equivalent to CHE 8A, CHE 118A, and CHE 128A, and the first half of CHE 118B, CHE 8B, and CHE 128B, so someone who took the first O-Chem series at my CC could move onto the 2nd course in the O-Chem series at UCD.</p>