| http://www.w3.org/ns/prov#value | - A method of retarding growth of bladder cancer tumors by means of photodynamic therapy using a benzochlorin metal complex as claimed in claim 1 wherein each of R9 through R11 is hydrogen, each of R1 through R8 is an alkyl group other than t-butyl having from 1 to 4 carbon atoms, and M is Cu.
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