RESIDUE 25R 16 CONECT N1 2 C2 C6 CONECT C2 3 N1 C3 C7 CONECT C3 3 C2 N4 H3 CONECT N4 2 C3 C5 CONECT C5 3 N4 C6 C8 CONECT C6 3 N1 C5 H6 CONECT C7 4 C2 H7 H7A H7B CONECT C8 4 C5 H8 H8A H8B CONECT H3 1 C3 CONECT H6 1 C6 CONECT H7 1 C7 CONECT H7A 1 C7 CONECT H7B 1 C7 CONECT H8 1 C8 CONECT H8A 1 C8 CONECT H8B 1 C8 END HET 25R 16 HETNAM 25R 2,5-dimethylpyrazine FORMUL 25R C6 H8 N2