,ring,OS,nitro
Benzene,hex,,0
Furan,penta,O,0
Imidazole,penta,,2
1-3-Oxazole,penta,O,1
Pyrazine,hex,,2
Pyrazole,penta,,2
Pyridine,hex,,1
Pyrimidine,hex,,2
Pyrrole,penta,,1
Thiazole,penta,S,1
Thiophene,penta,S,0
1-3-5-Triazine,hex,,3