Review Question - QID 213898

A 44-year-old man is brought to the emergency department as he was found intoxicated and belligerent at a public park. The patient was aggressive towards the police thus prompting them to bring him in. On the ride to the hospital, the patient became more confused and disoriented. On arrival, he has a Glasgow Coma Scale of 10 and is not answering questions coherently. His temperature is 97.6°F (36.4°C), blood pressure is 114/64 mmHg, pulse is 110/min, respirations are 25/min, and oxygen saturation is 99% on room air. Physical exam reveals a confused man who is covered in vomit. Initial laboratory studies are ordered as seen below.

Hemoglobin: 14 g/dL
Hematocrit: 42%
Leukocyte count: 9,900/mm^3 with normal differential
Platelet count: 222,000/mm^3

Serum:
Na+: 139 mEq/L
Cl-: 100 mEq/L
K+: 4.2 mEq/L
HCO3-: 10 mEq/L
BUN: 35 mg/dL
Glucose: 77 mg/dL
Creatinine: 1.9 mg/dL

Urinalysis is notable for the finding in Figure A. Which of the following toxic byproducts is most likely to be found in this patient?