new index	atom name	original index
1	C	5
2	C	6
3	C	2
4	C	7
5	C	3
6	N	1
7	N	9
8	O	8
9	O	4
10	O	10
11	H	14
12	H	15
13	H	16
14	H	17
15	H	13
16	H	11
17	H	12
18	H	18
19	H	19
20	H	20