d-aminolevulinic acid (ala) drug molecule. used in diagnosis and treatment (photodynamic therapy) of cancer. atoms are represented

aminolevulinic acid delta ala dala porphyrin synthesis pathway heme chlorophyll fluorescent glioma malignant visualize neurosurgery surgery intraoperative photodynamic therapy cancer diagnostic diagnosis hydrogen carbon oxygen nitrogen disease drug medicine medicinal product pharmacology pharmacy pharmaceutical pharma treatment generic molecule atoms chemical chemistry composition atomic model molecular