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