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