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