2841-82-9 Monoacetyl verrucarin A epoxide NSC292463 Spiro(3,5-methano-14H,20H,21H-oxireno[h][1,6,12]trioxacyclooctadecino[3,4-d][1]benzopyran-4(3H),2'-oxirane), verrucarin A deriv. VERRUCARIN A EPOXIDE, MONOACETYL Verrucarin A, 2'-O-acetyl-9,10-epoxy-9,10-dihydro-, (9.alpha.,10.alpha.)- Verrucarin A, O2'-acetyl-9,10-epoxy-9,10-dihydro-