Filed Pursuant to Rule 424(b)(5)
Registration No. 333-271301
PROSPECTUS SUPPLEMENT
(To Prospectus dated
April 25, 2023)
Up to $6,890,142
Common Stock
We have entered into an ATM
Sales Agreement, or the Sales Agreement, with Virtu Americas LLC, or the Sales Agent, relating to shares of our common stock, par value $0.0001 per share, offered by this prospectus supplement and the accompanying prospectus. In accordance with the
terms of the Sales Agreement, we may offer and sell shares of our common stock having an aggregate offering price of up to $6,890,142 from time to time through or to the Sales Agent, acting as our agent or principal. Sales of the shares of common
stock, if any, may be made on The Nasdaq Capital Market at market prices and such other sales as agreed upon by us and the Sales Agent, as the case may be.
Our common stock is listed on The Nasdaq Capital Market under the symbol BTTX. On May 10, 2023 the closing price of our common stock, as
reported on The Nasdaq Capital Market, was $0.8654 per share.
Sales of our common stock, if any, under this prospectus supplement will be made in sales
deemed to be an at the market offering as defined in Rule 415(a)(4) promulgated under the Securities Act of 1933, as amended, or the Securities Act. The Sales Agent is not required to sell any specific number or dollar amount of
securities, but will use commercially reasonable efforts to sell on our behalf all of the shares of common stock requested to be sold by us, consistent with their normal trading and sales practices, on mutually agreed terms between the Sales Agent
and us. There is no arrangement for funds to be received in any escrow, trust or similar arrangement.
The Sales Agent will be entitled to compensation at
a commission rate equal to up to 3.0% of the gross sales price of common stock sold under the Sales Agreement. See Plan of Distribution beginning on page S-16 for additional information
regarding the compensation to be paid to the Sales Agent. In connection with the sale of the common stock on our behalf, the Sales Agent will be deemed to be an underwriter within the meaning of the Securities Act and the compensation of
the Sales Agent will be deemed to be underwriting commissions or discounts. We have also agreed to provide indemnification and contribution to the Sales Agent with respect to certain liabilities, including liabilities under the Securities Act and
the Securities Exchange Act of 1934, as amended, or the Exchange Act.
We are an emerging growth company as that term is used in the Jumpstart Our Business
Startups Act of 2012 and, as such, have elected to comply with certain reduced public company reporting requirements for this prospectus supplement and future filings. See Prospectus Supplement Summary Implications of Being an
Emerging Growth Company and a Smaller Reporting Company.
As of the date of this prospectus supplement, we are subject to General Instruction
I.B.6 of Form S-3, which limits the amounts that we may sell under the registration statement of which this prospectus supplement is a part. As of April 10, 2023, the aggregate market value of our
outstanding common stock held by non-affiliates, or public float, was approximately $20,670,426, based on 14,157,826 shares of our outstanding common stock that were held by
non-affiliates on such date and a price of $1.46 per share, which was the price at which our common stock was last sold on The Nasdaq Capital Market on April 10, 2023 (a date within 60 days of the
date hereof), calculated in accordance with General Instruction I.B.6 of Form S-3. Pursuant to General Instruction I.B.6 of Form S-3, in no event will we sell securities
in a public primary offering with a value exceeding one-third of the aggregate market value of our common stock held by non-affiliates in any 12-month period, so long as the aggregate market value of our outstanding common stock held by non-affiliates remains below $75 million. We have not offered any
securities pursuant to General Instruction I.B.6 of Form S-3 in the 12 calendar months preceding the date of this prospectus supplement.
Investing in our common stock involves a high degree of risk. You should review carefully the risks and uncertainties referenced under the heading
Risk Factors on page S-9 of this prospectus supplement and in the documents that are incorporated by reference into this prospectus supplement.
Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if
this prospectus supplement or the accompanying prospectus is truthful or complete. Any representation to the contrary is a criminal offense.
Prospectus Supplement dated May 11, 2023