Bottled lemon juice works fine when you’re just adding a little to a recipe in which it’s not the predominant flavor. IF, however, you are making this LEMON bread, you need lemons. Not only will the juice be far more flavorful, but you need them for their zest, which adds even more flavor. I’m not saying it’s impossible to make the bread with bottled lemon juice, but I absolutely do not recommend it. Wait for a day when you’ve got the real thing!