new index	atom name	original index
1	C	10
2	C	11
3	C	12
4	C	13
5	C	6
6	C	7
7	C	8
8	C	9
9	C	2
10	C	3
11	C	4
12	C	5
13	O	1
14	H	18
15	H	19
16	H	20
17	H	21
18	H	14
19	H	15
20	H	16
21	H	17