Structure of compound The synthetic scheme below makes reference to a reagent $\ce{(CH_3)_3COCl}$  that is added at some points in the synthesis. 

What kind of structure does $\ce{(CH_3)_3COCl}$  have? The closest structure I can imagine is that of $\ce{(CH_3)_3CCOCl}$ with an extra carbon for the 3 methyl groups to be attached to. $\ce{(CH_3)_3COCl}$ seems to imply that the 3 methyl groups are attached to the carbonyl carbon (which is impossible). 



Image source: IChO 2015, Problem 6
Tert-butyl hypochlorite, cas no 507-40-4

Reagent for N-chlorination of amines and amides