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