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