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