If you’re planning on demoing, then I would go forward and send this email:
[Associate First Name], thanks for connecting. As you may know, we are heads down in prep mode for Alchemist's Demo Day. Alchemist has asked us not to take meetings prior to Demo Day unless a decision maker is in the room as well. If it's possible to bring in a [Associate Fund Name] partner -- specifically [Fund Partner] would be the right fit for us -- we can get permission to do the meeting. Otherwise, it would be best to wait to see us at Demo Day.
I can also connect you / [Fund Partner] to the Alchemist team if there are issues / questions.