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