C1CCC1 1 C1CCCC1 1 C1CCCCC1 1 C1CCCCCC1 1 C1CCCCCCC1 1 C1CCCNCC1 1 C1CCN=CC1 1 c1cscn1 1 C2Cc1ccncc1C2 1 c2ccc1cnccc1c2 1 c2ccc1[nH]cnc1c2 1 c2ccn1ccnc1c2 1 c2ncc1nc[nH]c1n2 2 C1CCNCC1 3 c1c[nH]cn1 5 c1ccccc1 7 c1ccncc1 21 nonring 35