<link href="//netdna.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<form class="form-horizontal">
<fieldset>
<legend>Pré-Cadastro</legend>
<div class="form-group">
<label class="col-md-4 control-label" for="Razão Social">Razão Social:</label>
<div class="col-md-5">
<input id="Razão Social" name="Razão Social" placeholder="Razão Social" class="form-control input-md" required="" type="text">
</div>
</div>
<div class="form-group">
<label class="col-md-4 control-label" for="CNPJ">CNPJ:</label>
<div class="col-md-5">
<input id="CNPJ" name="CNPJ" placeholder="CNPJ" class="form-control input-md" required="" type="text">
</div>
</div>
<div class="form-group">
<label class="col-md-4 control-label" for="CEP">CEP:</label>
<div class="col-md-5">
<input id="CEP" name="CEP" placeholder="CEP" class="form-control input-md" required="" type="text">
</div>
</div>