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