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