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	O	9
10	O	10
11	H	13
12	H	14
13	H	15
14	H	16
15	H	11
16	H	12
17	H	17
18	H	18
19	H	19
20	H	20
