Complex sentence: In planning the synthesis of phenylacetic acid, two synthons are identified: a nucleophilic "-COOH" group, and an electrophilic "PhCH 2 +" group.
Split into simpler sentences: In planning the synthesis of phenylacetic acid, two synthons are identified. A nucleophilic "-COOH" group, and an electrophilic "PhCH 2 +" group.