new index	atom name	original index
1	C	5
2	C	6
3	C	10
4	C	7
5	C	8
6	C	11
7	C	4
8	C	9
9	C	12
10	O	1
11	O	2
12	O	3
13	H	13
14	H	14
15	H	17
16	H	15
17	H	16
18	H	18
19	H	19
20	H	20