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