Fragment C—C—N—C—C—C
Fragments N—C—C—C—C and C
Fragments P—C and C—C—C—C
Fragments C—N—C—C and C—C
Fragments N–C–N, C, C, and C
Fragments C—C—C, N—C, and C
Fragments C—C, C—C, N, and C
Fragments N—C—C and C—C—C
Fragments C—N—C and C—C—C
Fragments C—N—C, C—C, and C