(R)-prunasin + UDP + H(+) => (R)-mandelonitrile + UDP-alpha-D-glucose
(r)-prunasin + udp + h(+) => (r)-mandelonitrile + udp-alpha-d-glucose
(R)-prunasin + UDP + H(+) => (R)-mandelonitrile + UDP-alpha-D-glucose
(r)-prunasin + udp + h(+) => (r)-mandelonitrile + udp-alpha-d-glucose