Meaning of the Abbreviation CCH in Graphic

[Sanborn Chase]

On 2/7/17 the following explanation of an accompanying graphic on phys.org read as follows:
"Integrated intensity distribution of CCH, superposed on the 0.8 mm dust continuum map. The infalling rotating envelope traced by CCH is broadened inward of the radius of about 150 au. Credit: Sakai et al. (RIKEN)
Read more at: https://phys.org/news/2017-02-protostar-strange-geometry.html#jCp"
The graphic represented the distribution of "CCH" in the protostar disk of L1527. Does CCH stand for carbon, chlorine, and hydrogen? Many thanks.

 

[Bandersnatch]

Most likely this: https://en.wikipedia.org/wiki/Ethynyl_radical

 

[Sanborn Chase]

Most excellent, Mr. Bandersnatch! Thanks very much.