. . "an organic compound usually formed as an intermediate product in the preparation of acetals from aldehydes or ketones"@en-us . "0"^^ . . . "hemiacetal"@en-us . "0"^^ . . . . "14905911-n"^^ . "114057782"@en-us . . . . "hemiacetal"^^ . "114905911"^^ . . "110696517"@en-us .