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