a 3-dehydro-D-guloside <=> a 3-dehydro-D-glucoside
a 3-dehydro-d-guloside <=> a 3-dehydro-d-glucoside
a 3-dehydro-D-guloside <=> a 3-dehydro-D-glucoside
a 3-dehydro-d-guloside <=> a 3-dehydro-d-glucoside