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