Claryfying the photo-toxicity of NDEA and colleagues: the link for elucidation of the skin cancers pathogenesis

Does anyone have any data on the phototoxicity of heterogeneous nitrosamines in drugs? There is evidence for nitrosomorpholine being photo carcinogenic without metabolic activation !
Probably also NDMA , as well as other nitrosamines have phototoxic/photocarcinogenic effects ?
Confirmatory phototoxicity/photocarcinogenicity tests would be a more than adequate explanation for the link between nitrosamine contaminated drug intake and skin cancer generation!
Clinical data / our data / for years , are indicative of just that!