NCIt definition : Any pharmaceutical that is administered as an inactive precursor that can be converted
to its pharmacologically active form through exposure to ultraviolet radiation or
sunlight.;
Alternative definition : NCI-GLOSS: A drug used in photodynamic therapy. When absorbed by cancer cells and
exposed to light, the drug becomes active and kills the cancer cells.;
ChEBI ID : CHEBI:47868;
Codes from synonyms : CDR0000045836; CDR0000442862;