O-Acetylalkannin

2-[(S)-1-Acetoxy-4-methyl-3-pentenyl]-5,8-dihydroxy-1,4-naphthoquinone

5,8-Dihydroxy-2-[(S)-1-acetoxy-4-methyl-3-pentenyl]-1,4-naphthalenedione

(S)-1-(1,4-Dihydro-5,8-dihydroxy-1,4-dioxonaphthalen-2-yl)-4-methyl-3-pentenyl=acetate