Spiro[cyclohexane-1,9'(6'H)-pyrazino[1',2':1,5]pyrrolo[2,3-d]pyrimidine]-7'(8'H)-carboxylic acid, 2'-(methylthio)-6'-oxo-5'-[[(trifluoromethyl)sulfonyl]oxy]-, 1,1-dimethylethyl ester
Spiro[cyclohexane-1,9'(6'H)-pyrazino[1',2':1,5]pyrrolo[2,3-d]pyrimidine]-7'(8'H)-carboxylic acid, 2'-(methylthio)-6'-oxo-5'-[[(trifluoromethyl)sulfonyl]oxy]-, 1,1-dimethylethyl ester