new index	atom name	original index
1	C	8
2	C	9
3	C	10
4	C	6
5	C	7
6	C	5
7	C	4
8	C	2
9	C	3
10	N	1
11	H	15
12	H	16
13	H	17
14	H	18
15	H	19
16	H	13
17	H	14
18	H	12
19	H	11