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