p. 2622 - 2626
(2016/05/09)(2008/12/05)
tert-butyl 7H-pyrrolo[3',4':3,4]pyrazolo[1,5-b][1,2,4]triazine-8(9H)-carboxylate
3-cyano-4-oxopyrrolidine-1-carboxylic acid tert-butyl ester
3-amino-2,6-dihydro-4H-pyrrolo[3,4-c]pyrazole-5-carboxylic acid tert-butyl ester
N-[(2R,3S)-2-(2,5-difluorophenyl)tetrahydro-5-oxo-2H-pyran-3-yl]carbamic acid 1,1-dimethylethyl ester
8,9-dihydro-7H-pyrrolo[3',4':3,4]pyrazolo[1,5-b][1,2,4]triazine