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