Starting in CMAQv5.3, markdown files with species tables for all supported mechanisms can be found in https://github.com/USEPA/CMAQ/tree/main/CCTM/src/MECHS/mechanism_information, for example cb6r3_ae7_aq
Since CB05 is no longer supported in CMAQv5.3, you need to look at the documentation of older releases. In CMAQv5.2.1, corresponding tables for several mechanism were included in Appendix A of the User Manual, e.g. for cb05e51_ae6_aq
Full documentation of the original CB05 mechanism and the subsequent updates to toluene chemistry can be found in these publications:
Yarwood, G., Rao, S., Yocke, M. and Whitten, G.Z. (2005) Updates to the Carbon Bond Chemical Mechanism: CB05. Final Report Prepared for the United States Environmental Protection Agency
Gary Z. Whitten, Gookyoung Heo, Yosuke Kimura, Elena McDonald-Buller, David T. Allen, William P.L. Carter, Greg Yarwood, A new condensed toluene mechanism for Carbon Bond: CB05-TU, Atmospheric Environment, Volume 44, Issue 40, 2010, Redirecting