new index	atom name	original index
1	C	1
2	C	2
3	C	5
4	C	3
5	C	4
6	C	6
7	C	11
8	C	7
9	C	8
10	C	12
11	C	9
12	C	10
13	C	13
14	Cl	18
15	Cl	19
16	O	14
17	O	15
18	O	16
19	O	17
20	H	21
21	H	22
22	H	20
23	H	23
24	H	24
25	H	27
26	H	28
27	H	25
28	H	26
29	H	29
30	H	30
31	H	31