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