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