2 (hydroxymethyl)tetrahydropyranyl 5 aminolevulinic acid 4 ALA 4 ALA derivatives 4 Aminolevulinic Acid 4 Aminolevulinic acid Animals 4 Bagg albino mouse 4 Male 4 Mammary Neoplasms, Animal 4 Mice 4 Mice, Inbred BALB C 4 PDT 4 Photochemotherapy 4 Photodynamic therapy 4 Photosensitizing Agents 4 Porphyrins 4 aminolevulinic acid 4 animal 4 animal cell 4 animal experiment 4 animal model 4 animal tissue 4 article 4 bioaccumulation 4 biosynthesis 4 breast tumor 4 cell line 4 chemistry 4 controlled study 4 correlation analysis 4