Fragments C—C—C—C and N—C—C
Fragments C—C—N—C—C and C
Fragments N—C—C—C and C—C—C
Fragments C—N—C—C—C and C—C
Fragments C—C—C—C—C—C and N
Fragments N—C—C—C—C and C—C
Fragments N—C, C—C, and C—C
Fragment C—N—C—C—C—C
Fragments C—C—C—C and Se
Fragment N—C—C—C—C—C