Citrine — Limonene, Citral, Geraniol. Bright, citrusy, energising.
Cutis — Ambroxide, Vanillin, Coumarin. Warm, resinous, close to the skin.
Petrichor — Geosmin, cis-3-Hexenol, Linalool. Geosmin is literally the molecule responsible for the smell of rain on dry earth, and the fragrance is named after exactly that smell.