Noun
A hypothetical hydrocarbon radical regarded as an essential residue of octane, and as entering into its derivatives; as, octyl alcohol.
Source: Webster's dictionaryA common form is a pair of aromatic benzene rings, with a nonpolar moiety (pentyl, heptyl, octyl, or alkyl oxy group) on one end and polar (nitrile, halogen) on the other. Source: Internet
Two sunscreen creams were prepared with 3.5% w/w octyl methoxycinnamate and 1% butyl methoxydibenzoylmethane. Source: Internet
These groups can range from methyl, ethyl, propyl, octyl, or phenyl groups. Source: Internet
The chemicals in question included benzophenone-1 (BP-1), BP-3, benzophenone-8 (BP-8), EHMC, octyl dimenthyl--aminobenzoic acid (OD-PABA), OC, 4-hydroxybenzophenone (4-HB), 4-methylbenzylidene camphor (4-MBC) and 3-benzylidene camphor (3-BC). Source: Internet