I picked out the closest things to it I could possibly find, but it wasn't as easy as you might think!
From L-R: MAC Chocolate Brown Pigment, HiFi Cosmetics Yuletide Carols, Barry M Dazzle Dust in 53 Chocolate, Sue Moxley brown from Famous palette.
As you can tell, they are sort of similar, but nothing quite matches it. I thought I would've found several dupes for it as I have a lot of browns, but these are the closest to it, and side by side they do not look alike.
Yuletide Carols is more bronze-toned, perhaps a more yellowish brown.
The Dazzle Dust has a much darker, blackened base, despite having a similar chocolatey brown shimmer.
The Sue Moxley colour is much more taupey when swatched, with more grey tones. It also has a chunkier texture, with less pigment.
So, sorry I couldn't find a match for MAC Chocolate Brown for you, but I hope that helps you if you were looking at any of these as a possible dupe.