new index	atom name	original index
1	C	1
2	C	3
3	C	4
4	C	5
5	C	6
6	N	2
7	O	7
8	H	9
9	H	10
10	H	8
11	H	11
12	H	12
13	H	13
14	H	14
15	H	16
16	H	15
17	H	17
18	H	18
19	H	19
