losoxantrone losoxantrone losoxantrone (biantrazole) is an anthroquinone anthrapyrazole antineoplastic agent and analog of mitoxantrone. it is also sometimes known as dup 941. losoxantroneidentifiers iupac name 7-hydroxy-2--5-(amino)dibenzoindazol-6(2h)-one cas number88303-60-0 ypubchem cid72116chemspider65094 yunii47kph00809comptox dashboard (epa)dtxsid60236949 chemical and physical dataformulac22h27n5o4molar mass425.489 g·mol−13d model (jsmol)interactive image smiles c1cc-2c(c(c1)o)c(=o)c3c(ccc4c3c2nn4ccncco)nccncco inchi inchi=inchi=1s/c22h27n5o4/c28-12-9-23-6-7-25-15-4-5-16-20-19(15)22(31)18-14(2-1-3-17(18)30)21(20)26-27(16)11-8-24-10-13-29/h1-5,23-25,28-30h,6-13h2 ykey:yroqeqpfucpdcp-uhfffaoysa-n y