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