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