(3S,3a′S,6a′R)-6a′-(Hydroxymethyl)dihydrospiro[furan-3,3′-furo[3,2-b]furan]-5,5′(3a′H,4H)-dione

(3S,3a′S,6a′R)-6a′-(Hydroxymethyl)dihydrospiro[furan-3,3′-furo[3,2-b]furan]-5,5′(3a′H,4H)-dione

Spiro[furan-3(2H),3′(2′H)-furo[3,2-b]furan]-5,5′(6′H,4H)-dione, dihydro-6′a-(hydroxymethyl)-, (3S,3a′S,6a′R)-

lappaceolide A