Table 2 Selected feature set

1

arctan (1/7)*

M-1/ncm⁵U

23

arctan (20/3)

X/ψ

2

arctan (1/12)

M-1/m¹A

24

arctan (20/35)

X/ms²t⁶A

3

arctan (2/21)

DHU/SAH

25

arctan (21/30)

SAH/m² ₂G

4

arctan (3/18)

Ψ/m³U

26

arctan (22/30)

m¹I/m² ₂G

5

arctan (5/7)

C/ncm⁵U

27

arctan (23/18)

m¹G/m³U

6

arctan (5/11)

C/AICA riboside

28

arctan (25/5)

ac⁴C/C

7

arctan (6/18)

acp³U/m³U

29

arctan (25/10)

ac⁴C/m³C

8

arctan (6/19)

acp³U/N⁶-SAR

30

arctan (25/22)

ac⁴C/m¹I

9

arctan (8/23)

M-3/m¹G

31

arctan (26/28)

m²G/ms²io⁶A

10

arctan (9/21)

U/SAH

32

arctan (26/30)

m²G/m² ₂G

11

arctan (11/5)

AICA riboside/C

33

arctan (27/13)

M-4/2,5-PCNR

12

arctan (11/33)

AICA riboside/MTA

34

arctan (28/19)

ms²io⁶A/N⁶-SAR

13

arctan (12/10)

m¹A/m³C

35

arctan (29/34)

m^2,2,7G/m⁶t⁶A

14

arctan (12/18)

m¹A/m³U

36

arctan (29/35)

m^2,2,7G/ms²t⁶A

15

arctan (13/9)

2,5-PCNR/U

37

arctan (30/21)

m² ₂G/SAH

16

arctan (13/20)

2,5-PCNR/X

38

arctan (31/2)

mcm⁵s²U/DHU

17

arctan (14/21)

m⁷G/SAH

39

arctan (31/24)

mcm⁵s²U/293

18

arctan (14/26)

m⁷G/m²G

40

arctan (33/11)

MTA/AICA riboside

19

arctan (16/22)

3,4-PCNR/m¹I

41

arctan (33/17)

MTA/m⁶ ₁A

20

arctan (18/10)

m³U/m³C

42

arctan (33/34)

MTA/m⁶t⁶A

21

arctan (18/21)

m³U/SAH

43

arctan (34/12)

m⁶t⁶A/m¹A

22

arctan (19/30)

N⁶-SAR/m² ₂G

44

arctan (34/19)

m⁶t⁶A/N⁶-SAR