methyl-[(S)-1-((S)-3-methyl-2-oxo-1,2,3,4-tetrahydro-pyrido[2,3-b]pyrazin-6-ylcarbamoyl)-ethyl]-carbamic acid tert-butyl ester 、
盐酸 以to afford the title compound (15 mg)的产率得到(S)-2-methylamino-N-[3-methyl-3-(3-methyl-butyl)-2-oxo-1-phenyl-2,3-dihydro-1H-pyrido[2,3-b][1,4]oxazin-6-yl]-propionamide hydrochloride