Complex sentence: One result of the large conjugated system is that porphyrin molecules typically have very intense absorption bands in the visible region and may be deeply colored; the name "porphyrin" comes from the Greek word πορφύρα ("porphyra "), meaning"purple".
Split into simpler sentences: One result of the large conjugated system is that porphyrins typically absorb strongly,,, in the visible region, i.e. they are deeply colored. The name "porphyrin" comes from the Greek word πορφύρα ("porphyra "), meaning"purple".