C07C33/00	Unsaturated compounds having hydroxy or O-metal groups bound to acyclic carbon atoms
	Note(s) In this group, in condensed ring systems of six-membered aromatic rings and other rings, the double bond belonging to a benzene ring is not considered as unsaturated for the non-aromatic ring condensed thereon, e.g. the 1,2,3,4-tetrahydro- naphthalene ring is considered to be saturated outside the aromatic ring.[3]