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