CC=CC C6C6C6CCZC6 CCCC6C6CxCC6 C6 CC(C6C6C6CHCC6 C6 CCCC6CaCCC=CC CCCCCZC:CCCCCCxC:C:C:CC(CCCCHCC:C:CCCCCaCCC=CC CCCCChChCCCCCCxChChC