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