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