new index	atom name	original index
1	C	2
2	C	3
3	C	4
4	C	5
5	C	6
6	C	7
7	O	1
8	H	8
9	H	9
10	H	10
11	H	11
12	H	12
13	H	13
14	H	14
15	H	15
16	H	16
17	H	17