How do I add new VOCs to the mechanism?

Hello, everybody!
I am using the CMAQ-5.3.2 version with the mechanism cb6r3_ae7_aq, and now, I have an inventory that includes the emissions of p-xylene, styrene, 1.2-dichloropropane, 2-chlorotoluene, and 3-chlorotoluene. How should I revise the mechanism files so that these new VOCs can be used for simulating PM2.5 and ozone?
Thanks a lot.

There is a tutorial for CMAQv5.4 for modifying a chemical mechanism.
We recommend that you upgrade to the latest version and follow these instructions:
CMAQ/DOCS/Users_Guide/Tutorials/CMAQ_UG_tutorial_chemicalmechanism.md at main · USEPA/CMAQ · GitHub

Thanks for your response, this is super helpful. :handshake: