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