new index	atom name	original index
1	C	9
2	C	10
3	C	7
4	C	8
5	C	5
6	C	6
7	C	11
8	C	12
9	O	1
10	O	3
11	O	2
12	O	4
13	H	15
14	H	16
15	H	13
16	H	14
17	H	17
18	H	18