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