rebaudioside M + UDP + H(+) => rebaudioside D + UDP-alpha-D-glucose
rebaudioside m + udp + h(+) => rebaudioside d + udp-alpha-d-glucose
rebaudioside M + UDP + H(+) => rebaudioside D + UDP-alpha-D-glucose
rebaudioside m + udp + h(+) => rebaudioside d + udp-alpha-d-glucose