H2

H1

H8

C4

N3

C2

N1

O6

C6

C5

N7

C8

N9

OH

H1S

jH2S

iH2S

H3S

H4S

jH5S

iH5S

O3P

O2P

O1P

O2S

O3S

O4S

C1S

C2S

C3S

C4S

C5S

O5S

P