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