Ac      C2  H3      O           # Acetyl
Ade     C5  H4  N5              # Adeninyl
Bn      C7  H7                  # Benzyl
Bu      C4  H9                  # Butyl
Bz      C7  H5      O           # Benzoyl
BOC	C5  H9      O2		# Butyloxycarbonyl
CE      C3  H4  N               # Cyanoethyl
Cyt     C4  H4  N3  O           # Cytosinyl
DBAM    C9  H19 N               # Dibutylaminomethylene, biradical
DMAM    C3  H7  N               # Dimethylaminomethylen, biradical
DMTr    C21 H19     O2          # Dimethoxytrityl
Et      C2  H5                  # Ethyl
Gua     C5  H4  N5  O           # Guaninyl
iBu     C4  H9                  # iso-Butyl
iPr     C3  H7                  # iso-Propyl
Me      C   H3                  # Methyl
Ms      C   H3  S   O2          # Mesyl
MOC	C2  H3      O2		# Methoxycarbonyl
MOM	C2  H5      O		# Methoxymethyl
MMTr	C20 H16     O		# Monomethoxytrityl
Ph      C6  H5                  # Phenyl
@F      C6  H5                  # Phenyl
Pr      C3  H7                  # Propyl
TBDMS   C6  H15 Si              # tert-Butyldimethylsilyl
TBDPS   C16 H19 Si              # tert-Butyldiphenylsilyl
tBu     C4  H9                  # tert-Butyl
Tf      C   F3  S   O2          # Triflyl
Thy     C5  H5  N2  O2          # Thyminyl
TMS     C3  H9  Si              # Trimethylsilyl
TMTr    C22 H22     O3          # Dimethoxytrityl
Tol     C8  H7      O           # Tolyl
Tr      C19 H15                 # Trityl
Ts      C7  H7  S   O2          # Tosyl
Ura     C4  H3  N2  O2          # Uracilyl
Z       C8  H7      O2          # Benzyloxycarbonyl