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