Phototoxicity or photoirritation This is irritation resulting from light-induced molecular changes in the structure of chemicals 
(This; is; irritation resulting from light-induced molecular changes in the structure of chemicals) (irritation; resulting; from light-induced molecular changes in the structure of chemicals)
This irritation
is resulting
irritation resulting from light-induced molecular changes in the structure of chemicals
from light-induced molecular changes in the structure of chemicals