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