new index	atom name	original index
1	C	10
2	C	8
3	C	11
4	C	7
5	C	5
6	C	9
7	C	6
8	C	12
9	O	2
10	O	1
11	O	3
12	O	4
13	H	16
14	H	15
15	H	17
16	H	14
17	H	13
18	H	19
19	H	18
20	H	20