JSFiddle - React, Tailwind, and code Playground

HTML

<p>Milho
    <input type="checkbox" class="check">
</p>
<p>Sorgo
    <input type="checkbox" class="check">
</p>
<p>Monenzina
    <input type="checkbox" class="check">
</p>
<p>Calcário Calcítico
    <input type="checkbox" class="check">
</p>
<p>Farelo de Soja
    <input type="checkbox" class="check">
</p>
<p>Farelo de Algodão
    <input type="checkbox" class="check">
</p>
<p>Aromatizante
    <input type="checkbox" class="check">
</p>
<p>Farelo de Arroz
    <input type="checkbox" class="check">
</p>
<button id="add-button" type="submit">Adicionar</button>
<div id="receiver">
    <form id="form-receiver">
        <fieldset></fieldset>
    </form>
</div>

JavaScript

function camelCase(input) {
    return input.toLowerCase().replace(/[-\s](.)/g, function (match, group1) {
        return group1.toUpperCase();
    });
}
$('#add-button').click(function () {
    $('.check').each(function () {
        if (this.checked) {
            var nome = $(this).parent().text();
            if (!$('#form-receiver').find("input[name='" + camelCase(nome) + "']").length) {
                $('#form-receiver fieldset').append("<p>" + nome + "<input name='" + camelCase(nome) + "'></p>")
            }
        }
    })
});