CPC Subgroup
C07C 15/38 containing four rings
Full Title
Cyclic hydrocarbons containing only six-membered aromatic rings as cyclic parts > Polycyclic condensed hydrocarbons > containing four rings
C07C 15/38 Cyclic hydrocarbons containing only six-membered aromatic rings as cyclic parts > Polycyclic condensed hydrocarbons > containing four rings