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