Serenolide

Say itsuh-REN-uh-lyde

Clean, soft white musk with a light floral undertone.

What it is: A molecule made in a lab.
When you smell it: Dry-down: hours later.
What perfumers do with it: Modern clean musk for volume and softness in fine fragrance and fabric care.

Not on the label of any of the 232 perfumes read so far.

Sources