new index	atom name	original index
1	C	18
2	C	19
3	C	13
4	C	20
5	C	17
6	C	14
7	C	15
8	C	16
9	N	22
10	N	21
11	O	24
12	O	23
13	H	2
14	H	3
15	H	4
16	H	5
17	H	6
18	H	1
19	H	7
20	H	8
21	H	9
22	H	10
23	H	12
24	H	11