IUPAC:2-[(1R,3S,3'R,4'R,6'R)-4'-(acetyloxy)-3',9-dihydroxy-6'-methyl-5,10-dioxo-3,4,5,10-tetrahydrospiro[naphtho[2,3-c]pyran-1,2'-oxan]-3-yl]acetic acid
IUPAC:2-[(1R,3S,3'R,4'R,6'R)-4'-(acetyloxy)-3',9-dihydroxy-6'-methyl-5,10-dioxo-3,4,5,10-tetrahydrospiro[naphtho[2,3-c]pyran-1,2'-oxan]-3-yl]acetic acid