SMARTS: [c;H1:3]1:[c:4]:[c:5]:[c;H1:6]:[c:7]2:[nH:8]:[c:9]:[c;H1:1]:[c:2]:1:2.O=[C:10]1[#6;H2:11][#6;H2:12][N:13][#6;H2:14][#6;H2:15]1>>[#6;H2:12]3[#6;H1:11]=[C:10]([c:1]1:[c:9]:[n:8]:[c:7]2:[c:6]:[c:5]:[c:4]:[c:3]:[c:2]:1:2)[#6;H2:15][#6;H2:14][N:13]3