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