RESIDUE 1JX 21 CONECT O 1 C CONECT C 3 O NAG CA CONECT NAG 3 C CAK H1 CONECT CAK 3 NAG NAF CAJ CONECT NAF 2 CAK CAD CONECT CAD 3 NAF CAC H2 CONECT CAC 3 CAD CAE H3 CONECT CAE 3 CAC CAJ H4 CONECT CAJ 3 CAK CAE N CONECT N 3 CAJ CA H5 CONECT CA 4 C N CB H6 CONECT CB 4 CA H7 H8 H9 CONECT H1 1 NAG CONECT H2 1 CAD CONECT H3 1 CAC CONECT H4 1 CAE CONECT H5 1 N CONECT H6 1 CA CONECT H7 1 CB CONECT H8 1 CB CONECT H9 1 CB END HET 1JX 21 HETNAM 1JX (2R)-2-methyl-1,4-dihydropyrido[2,3-b]pyrazin-3(2H)-one FORMUL 1JX C8 H9 N3 O1