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