3-O-alpha-L-mycarosylerythronolide B + dTDP-alpha-D-desosamine = erythromycin D + dTDP + H(+)
3-o-alpha-l-mycarosylerythronolide b + dtdp-alpha-d-desosamine = erythromycin d + dtdp + h(+)
3-O-alpha-L-mycarosylerythronolide B + dTDP-alpha-D-desosamine = erythromycin D + dTDP + H(+)
3-o-alpha-l-mycarosylerythronolide b + dtdp-alpha-d-desosamine = erythromycin d + dtdp + h(+)