(a) Bongkrekic acid is a toxic compound produced by Pseudomonas cocovenenans, and isolated from a mold that rows on bongkrek, a fermented Indonesian coconut dish. (a) Label each double bond as E, Z or neither (N).

(b) How many total stereoisomers (including all types) are possible for bongkrekic acid ? _______.
(c) How many sites of unsaturation are present in bongkrekic acid ? _____.

Answer

(a) 1 - Z; 2-E; 3 - E; 4 - Z; 5 – Z; 6- E

Explanation

1-Z , 2-E , 3-E , 4-Z , 5-Z , 6-E
If higher priority atoms/groups are situated on same side then configuration will be (Z) and if these are situated on opposite side, then configuration will be (E).