new index	atom name	original index
1	C	9
2	C	11
3	C	10
4	C	12
5	C	14
6	C	16
7	C	13
8	C	15
9	C	7
10	C	6
11	C	18
12	C	17
13	C	5
14	C	8
15	Cl	3
16	Cl	4
17	Cl	1
18	Cl	2
19	H	22
20	H	24
21	H	21
22	H	23
23	H	26
24	H	28
25	H	25
26	H	27
27	H	19
28	H	20