Pomarina is olfactively not a bright green apple but a dark polychromatic one. And to be honest, the more you smell it, the less pommaceous it really is.
 
Just to make it easier here are the main parts of this page so you can jump to wherever you need to. 
 
Background
Chemistry
Complexity
Other facets/ more musings to follow
 
Background 
Recently, IFF have been pursuing an interesting tactic with regards to launches. Rather than finally giving us long anticipated and potentially famous captives for which the patent has expired or almost expired, they are releasing molecules seemingly only invented in the last few years. Both Luminide and Pomarina are not only new to us as perfumers external to IFF but are also relatively new to even internal IFF perfumers. 
 
Chemistry
Genuinely new fruity notes can be difficult in perfumery once you've exhausted all the possibilities with esters. Peculiarly, this material is not an ester but in fact an ether. Structurally, it takes the classic TCD (tricyclodecane) skeleton and appends this moiety to the cyclopentane portion. It's hard to believe that this skeleton is also responsible for woody things like mysore acetate and patchouli indene, fruity notes like Gardocyclene and Fruity carboxylate, and even muguets like Dupical and Aquaflora. It's an incredibly versatile (and quite stable) way to arrange atoms.
 
Complexity
Some fruity materials in perfumery are highly recognisable. What that means psychophysically is that once smelled, they resolve quickly and insistently into pineapple, pear or strawberry, for example. Others are a bit more vague. Perhaps the best example of this would be Fructalate, which is often referred to as a sort of hedione for fruity notes, ceding recognisability for a certain protean vagueness.
 
For instance, there isn't really that bite you get with apple or the sourness of hexyl acetate or hexyl isobutyrate. Nor is there the sharp greenery of materials like williams ester or the pineapple notes of manzanate. Instead, it is almost like a very abstract fruity air that you might catch downwind on a summer evening somewhere in Europe.
 
The internal complexity of Pomarina is not just my opinion either. In their 2018 patent application, IFF even go so far as to rate the odour strength and complexity of various isomers and mixtures of this parent compound. Some are judged to be “thin” or green, others berry-like, and others still tropical or herbal. The blend that eventually made it to market was rated to be the most complex of all, scoring 9/10 for strength and 10/10 for complexity.
 
Other facets
Grapefruit, think Vigoflor but less tart and sour, and more rounded.
Watermelon.
Spicy?
Carrot/pumpkin