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