16-alpha,17-Dihydroxypregn-4-ene-3,20-dione cyclic acetal with 2-furyl methyl ketone 7148-96-1 NSC 71222 NSC 72298 Pregn-4-ene-3,20-dione, 16-alpha,17-dihydroxy-, cyclic acetal with 2-furyl methyl ketone