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