3. Viridenomycin, shown below, is a polyene antibiotic that displays anti-tumor
activity. Its structural complexity and chemical instability have made it a
challenging target for organic chemists to synthesize. Ignoring the benzene ring,
how many disubstituted Z alkenes are present in viridenomycin?
HO
H3CO
A. 1
B. 2
C. 3
D. 4
HO
viridenomycin
0
NH