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