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