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