4'-O-demethylsordarin + GDP + H(+) => sordaricin + GDP-6-deoxy-alpha-D-altrose
4'-o-demethylsordarin + gdp + h(+) => sordaricin + gdp-6-deoxy-alpha-d-altrose
4'-O-demethylsordarin + GDP + H(+) => sordaricin + GDP-6-deoxy-alpha-D-altrose
4'-o-demethylsordarin + gdp + h(+) => sordaricin + gdp-6-deoxy-alpha-d-altrose