thymine + A + H2O = 5-methylbarbiturate + AH2 + H(+)
thymine + a + h2o = 5-methylbarbiturate + ah2 + h(+)
thymine + A + H2O = 5-methylbarbiturate + AH2 + H(+)
thymine + a + h2o = 5-methylbarbiturate + ah2 + h(+)