new index	atom name	original index
1	C	4
2	C	5
3	C	9
4	C	10
5	C	6
6	C	7
7	C	11
8	C	2
9	C	8
10	C	3
11	O	1
12	H	13
13	H	15
14	H	14
15	H	17
16	H	18
17	H	16
18	H	21
19	H	22
20	H	19
21	H	20
22	H	23
23	H	24
24	H	12
25	H	25