CnH2nC_{n} H_{2 n}CnH2n
CnH2n+1C_{n} H_{2 n+1}CnH2n+1
CnH2n−1C_{n} H_{2 n-1}CnH2n−1
CnH2n+2C_{n} H_{2 n+2}CnH2n+2