PTERIDINES (HETEROCYCLIC HYDROCARBONS)
-
BTHETERO-BICYCLIC HYDROCARBONS/NITROGEN TETRAHETERO
-
BTCONDENSED HETERO-POLYCYCLIC HYDROCARBONS/ONLY NITROGEN AS HETEROATOM
-
UDC547.89,9*1*1*4*1*1*1
-
Descriptor GERPTERIDINE (HETEROCYCLISCHE KOHLENWASSERSTOFFE)
-
Descriptor ENGPTERIDINES (HETEROCYCLIC HYDROCARBONS)
-
Descriptor FREPTÉRIDINES (HYDROCARBURES HÉTÉROCYCLIQUES)
-
NTBERBERINES, INDIGOID PIGMENTS AND PTERINS (NATURAL DYES)
-
NTLUMAZINE + DIOXOTETRAHYDROPTERIDINES (HETEROCYCLIC HYDROCARBONS)
-
NTPTERIDINE AND DERIVATIVES (HETEROCYCLIC HYDROCARBONS)