c1ccco1 furan
c1cccs1 thiophene
c1cncs1 thiazole
c1cnco1 oxazole
c1ccno1 isoxazole
c1nnco1 1,3,4-oxadiazole
n1ccno1 1,2,5-oxadiazole
c1ncno1 1,2,4-oxadiazole
c1cnno1 1,2,3-oxadiazole
n1cnno1 1,2,3,5-oxatriazole
c1nnno1 1,2,3,4-oxatriazole
c1ccns1 isothaizole
c1nncs1 1,3,4-thiadiazole
c1cnns1 1,2,3-thiadiazole
n1ccns1 1,2,5-thiadiazole
c1ncns1 1,2,4-thiadiazole
c1nnns1 1,2,3,4-thiatriazole
n1cnns1 1,2,3,4-thiatriazole
c1ccc[se]1 selenophene
c1ccccc1 benzene
c1ccccn1 pyridine
c1ccnnn1 1,2,3-triazine
c1cncnn1 1,2,4-triazine
c1ncncn1 s-triazine
c1ccncn1 pyrimidine
c1cnccn1 pyrazine
c1cccnn1 pyridazine
c1nncnn1 1,2,4,5-tetrazine
c1cnnnn1 1,2,3,4-tetrazine
n1cnnnc1 1,2,3,5-tetrazine
c12ccccc1cccc2 naphthalene
c12ccccc1cc3c(cccc3)c2 anthracene
c12cccnc1cccc2 quinoline
n1nncc1 1H-1,2,3-triazole
n1nnnc1 1H-tetrazole
n1nccc1 1H-pyrazole
n1ncnc1 1H-1,2,4-triazole
c1cccc2sc3nncn3c12 benzo[4,5]thiazolo[2,3-c][1,2,4]triazole
c1ccccc1n1cccc1c1ccccc1 1,2-diphenyl-1H-pyrrole
c1cc(c2ccccc2)n(c2ccccc2)c1 1,2-diphenyl-1H-pyrrole
c1(ncc2)n2cco1 imidazo[2,1-b]oxazole
c1(nnc2)n2ccs1 thiazolo[2,3-c][1,2,4]triazole
c1(nnc2)n2cco1 oxazolo[2,3-c][1,2,4]triazole
c1(n2cccc2)ccccc1 1-phenyl-1H-pyrrole
c16.c21.c32.c43.c54.c65 benzene
c1[cH][cH]ccc1 benzene
C1(N23)=CC=CC2=CC=CC3=CC=C1 pyrido[2,1,6-de]quinolizine
c12c3c(ccc2)c(ccc4)c5c4cccc5c3ccc1 perylene
