Der Stein der Weisen, oder die Zauberinsel (The Philosopher`s Stone, or the Enchanted Isle) is a two-act singspiel jointly composed by Johann Baptist Henneberg, Benedikt Schack, Franz Xaver Gerl, Emanuel Schikaneder, and Wolfgang Amadeus Mozart in 1790.
Mozart composed:
1. Act 2 - Duett (Lubano, Lubanara) `Nun, liebes Weibchen`.
2. Act 2 - Finale `Miau! Miau!`.
3. Act 2 - Finale `Fort, armer Jüngling`.
https://en.wikipedia.org/wiki/Der_Stein_der_Weisen