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