Complex sentence: A synthesis strategy, therefore, starts from molecules which correspond to these corners: derivatives of phthalic acid: phthalonitrile, o-cyanobenzamide, phthalanhydride, phthalimide or diiminoisoindole.
Split into simpler sentences: A synthesis strategy, therefore, starts from molecules which correspond to these corners. Such molecules are derivatives of phthalic acid: e.g., phthalonitrile, o-cyanobenzamide, phthalanhydride, phthalimide or diiminoisoindole.