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