[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][O][P+1][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a phosphonic ester that is the monoethyl ester of phosphonic acid. A fungicide used (as its aluminium salt) for various horticultural crops used to control a range of diseases including Phytophthora, Pythium and Plasmopara. It has a role as an antifungal agrochemical. It is a conjugate acid of a fosetyl(1-)."}]