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