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