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