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