new index	atom name	original index
1	C	9
2	C	11
3	C	8
4	C	6
5	C	12
6	C	10
7	C	7
8	C	13
9	O	3
10	O	2
11	O	1
12	O	4
13	O	5
14	H	16
15	H	17
16	H	15
17	H	14
18	H	20
19	H	19
20	H	18
21	H	21