.beta.-D-Ribofuranoside, methyl 5-[(2-chloroethyl)ethylamino]-5-deoxy-2,3-O-(1-methylethylidene)-, hydrochloride 6331-01-7 Furo[3,4-d]-1,3-dioxole, .beta.-D-ribofuranoside deriv. NSC45632 Ribofuranoside, methyl 5-[(2-chloroethyl)ethylamino]-5-deoxy-2,3-O-isopropylidene-, hydrochloride, .beta.-D-