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"My guess is that this molecule is Melatonin"
you're right.

congrats!
https://en.wikipedia.org/wiki/Melatonin

just sent you 100 STEM and 5 Hive

and if you want to get 200 TMN (TranslateMe Network token) (NEO-based)

https://coinmarketcap.com/currencies/translateme-network-token/

you need to provide me here in the comments section your
NEO-address (it's not recommended to give the one from exchanges).
It's highly recommended to get it with the help of O3-wallet.
if you don't have it, you can follow my little guide on how to create the one (it should take just a couple of minutes).

https://peakd.com/neo/@alexbiojs/o3-your-gateway-to-the-smart-economy-of-neo-and-ontology-introduction-part-1-o3-wallet-a-creating-a-new-wallet
(O3 (Your gateway to the Smart Economy of NEO and Ontology). Introduction. Part 1. O3 wallet. A. Creating a new wallet)

thanks for your interest for this contest/league.

I just set up my O3 wallet, thanks for the tutorial! Here's my address:

AFvHZky3NWNRhuctVQ2Sa1CKzwQcLGGJYK

just sent 200 TMN

Transaction ID: 1b53a0b5270ebbe7086a26343187789b097b08e3f31e6122b36b8e6be470af14

https://neoscan.io/transaction/1B53A0B5270EBBE7086A26343187789B097B08E3F31E6122B36B8E6BE470AF14

Received, ty again. On a separate note,there’s a newly released version of Steemworld for Hive that was shared in my community recently and I thought I’d share it with you:

http://beeme.icu/?account=alexbiojs

thank you, just looked at it. it's amazing and will be helpful for the contest/league as well.