Here you are (thanks to the German, Italian and English Wikipedia pages it was just a matter of copy and paste).
The cite is from the memoirs of his wife Olga Knipper who describes the last minutes of his life:
„Kurz nach Mitternacht wachte er auf und bat erstmals in seinem Leben selbst darum, einen Arzt zu holen […] Es kam der Doktor, verfügte, ein Glas Champagner zu bringen. Anton Pawlowitsch setzte sich auf und sagte irgendwie bedeutungsvoll, laut zu dem Arzt auf deutsch (er konnte nur sehr wenig Deutsch!): ‚Ich sterbe…‘ Dann nahm er das Glas, wandte sich zu mir, […] sagte: ‚Lange keinen Champagner mehr getrunken …‘, trank [das Glas] in aller Ruhe aus, legte sich still auf die linke Seite und war bald für immer verstummt.“
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Si risvegliò di colpo verso mezzanotte: ansimando chiese un medico. Delirava, ma riprese lucidità quando Ol'ga gli applicò la borsa del ghiaccio sul petto: «Non si mette il ghiaccio su un cuore spento». Alle due venne il medico: «Ich sterbe» - gli disse piano Čechov - io muoio. Il dottore gli fece un'iniezione e volle procurarsi dell'ossigeno, ma lo scrittore lo fermò: «È inutile». Allora fu ordinato champagne. «È tanto che non bevo champagne»: bevve e si distese sul fianco. Poi fu silenzio.
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Anton sat up unusually straight and said loudly and clearly (although he knew almost no German): Ich sterbe ("I'm dying"). The doctor calmed him, took a syringe, gave him an injection of camphor, and ordered champagne. Anton took a full glass, examined it, smiled at me and said: "It's a long time since I drank champagne." He drained it and lay quietly on his left side, and I just had time to run to him and lean across the bed and call to him, but he had stopped breathing and was sleeping peacefully as a child ...
Happy New Year to everyone!
С Новым Годом всех!
or
Всех с новым годом!
(Hope that Google did a good job 😉
