new index	atom name	original index
1	C	13
2	C	5
3	C	6
4	C	9
5	C	7
6	C	8
7	C	11
8	C	4
9	C	10
10	C	12
11	O	1
12	O	3
13	O	2
14	H	21
15	H	22
16	H	23
17	H	14
18	H	15
19	H	16
20	H	17
21	H	18
22	H	19
23	H	20