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