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