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