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