new index	atom name	original index
1	C	7
2	C	8
3	C	9
4	C	10
5	C	6
6	C	11
7	C	5
8	C	12
9	N	4
10	O	2
11	O	1
12	O	3
13	H	14
14	H	15
15	H	16
16	H	17
17	H	13
18	H	18
19	H	19
20	H	21
21	H	20