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