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