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