HETEROCYCLIC COMPOUNDS WITH NITROGEN HETERO-ATOM[S] ONLY CONTAINING AN UNFUSED PYRAZOLE RING WHETHER OR NOT HYDROGENATED IN THE STRUCTURE (EXCL. PHENAZONE ANTIPYRIN AND ITS DERIVATIVES)
HETEROCYCLIC COMPOUNDS WITH NITROGEN HETERO-ATOM[S] ONLY CONTAINING AN UNFUSED PYRAZOLE RING WHETHER OR NOT HYDROGENATED IN THE STRUCTURE (EXCL. PHENAZONE ANTIPYRIN AND ITS DERIVATIVES)