c1ccccc1
C1CCOCC1
C1c2ccccc2-c3c1cccc3
c1ccc(cc1)c2ccccn2
c1ccc(cc1)c2nccs2
C(Cc1ccccc1)c2ccccc2
C(Nc1ccccc1)c2ccccc2
O=S(=O)(Nc1ccon1)c2ccccc2