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