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Images a of toxicity assays with (3E) 3-N-(2-hydroxyphenylmethylidene)amino-4-imino-9-methoxy-3,5-dihydro-4H-chromeno[2,3-d]pyrimidine 10h, with sorafenib and erlotinib b for comparison, on zebrafish Danio rerio eleutheroembryos (according to Fish Embryo Acute Toxicity (FET) Test, OCDE (2013) [18]).
