new index	atom name	original index
1	C	1
2	C	2
3	C	3
4	C	4
5	C	6
6	C	5
7	C	9
8	C	7
9	C	10
10	C	8
11	C	11
12	N	12
13	N	13
14	O	14
15	O	15
16	H	16
17	H	17
18	H	18
19	H	19
20	H	21
21	H	22
22	H	20
23	H	23
24	H	24
25	H	25
26	H	26
27	H	27