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