Compiled from the Note Identification Project Thread:
Aldehyde C16 – Strawberry. Found this as a less potent, slightly fruity C12. From the four aldehydes I have smelled, C12, 16 and Mandarine all have that dusty, sneezy smell. C14 didn't so I wondered why, until I found out Aldehyde C14 is actually a lactone not an aldehyde! This may explain why I like some fragrances with aldehydes and dislike others - I liked C14.
Aldehyde C16 – Strawberry, definitely. Pleasantly fruity but high-pitched and waxy. Needs to be sweeter and smoother to smell like real strawberries. Could use creaminess.