Low molecular weight derivatives of carboxamide halogenated porphyrins, i.e., chlorin and bacteriochlorin, and applications thereof The present invention relates to carboxamide halogenated porphyrin derivatives of the formula: Wherein ## STR2 ## represents a carbon-to-carbon single bond or a carbon-to-carbon double bond, provided that at least one ## STR3 ## is from carbon to carbon. Y1 and Y2 each independently represents a single bond, selected from hydrogen, halogenated alkyl or halogenated cycloalkyl having 6 or less carbon atoms, or phenyl halide, wherein halogen is independently F, Cl And Br, provided that at least one of said alkyl, said cycloalkyl or said phenyl In which at least one of Y1, Y2 is not hydrogen and R1 is selected from H, I, Cl, Br or —CONR′R ″, wherein R ′ and R '' Is independently hydrogen, alkyl having 6 or less carbon atoms, cyclopropyl, cyclobutyl, cyclopentyl, alcohol, primary amine, secondary amine, tertiary amine, positively charged quaternary amine , Carboxylic acid, ether or ester. The invention also relates to the use of a carboxamide halogenated porphine derivative of formula (I) as described above in photodynamic therapy, in particular bacteriochlorin or chlorin, or a pharmaceutically acceptable salt thereof, said derivatives referred to herein Can detect and indicate the presence of hyperproliferative abnormalities and can treat the same in the presence of appropriate light. The present invention also provides one or more carboxamide halogenated porphyrin derivatives of the formula (I), in particular bacteriochlorin or chlorin, or the treatment thereof for the treatment of human or animal cancer and / or microbial and / or viral infections A pharmaceutical composition comprising a pharmaceutically acceptable salt is described.【課題】カルボキサミドハロゲン化ポルフィリンの低分子量誘導体、即ちクロリン及びバクテリオクロリンと、その応用【解決手段】本発明は式【化1】のカルボキサミドハロゲン化ポルフィリン誘導体、特に、バクテリオクロリン若しくはクロリン、又はその薬学的に許容される塩に関するものであり、ここで、【化2】は炭素と炭素の単結合又は炭素と炭素の二重結合を表し、但し、少なくとも一つの【化3】は炭素と炭素の単結合を表し、Y1、Y2はそれ