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