A 50-year-old man complains of general weakness, dizziness, periodical episodes of unconsciousness, and an intense pain in the small of his back and right subcostal region. These signs appeared after an accident at a paint factory, where he works. His skin is earth gray and his sclerac are icteric. He has acrocyanosis, His blood pressure is 100/60 mm Hg. His heart sounds are muffled. His liver is-3 cm and has a dense edge. Blood test shows the following erythrocytes - 2.0 × 10/L. Hb - 90 g/L. Heinz-Ehrlich bodies, leukocytes 5.6 × 10/L, ESR 15 mm/hour, methemoglobin - 62%, total bilirubin-84.0 mcmol indirect bilirubin 71.7 mcmol/L. What is the most likely diagnosis in this case?