Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Convertible Promissory Note (right to buy)^F1,F2,F4	$0.12	Feb 26, 2019	P	—	A	Feb 26, 2019	—	Common Stock	—	—	D
Common Stock Warrant (right to buy)^F1,F3,F4	$0.18	Feb 26, 2019	J	2,884,615	A	Aug 26, 2019	Feb 26, 2024	Common Stock	2,884,615	2,884,615	D

Explanation of responses

F1On February 26, 2019, in a private placement by the issuer, Essetifin S.p.A. ("Essetifin") entered into a Convertible Note and Warrant Purchase Agreement (the "Agreement"), pursuant to which it agreed to purchase an aggregate principal amount of $1,000,000 of convertible promissory notes of the issuer and warrants to acquire the issuer's common stock, in two $500,000 tranches. Each tranche consists of (i) a note in the principal amount of $500,000 and (ii) a warrant to purchase 2,884,615 shares of the issuer's common stock at an exercise price of $0.18 per share, issued in connection with the Agreement as partial consideration for the note. Essetifin purchased the first $500,000 tranche effective as of February 26, 2019 (such purchase consisting of the "February 2019 Note" and the "February 2019 Warrant").
F2The February 2019 Note and any accrued interest thereon are convertible at the option of the holder at any time prior to repayment of the February 2019 Note into the issuer's common stock at a conversion price of $0.12 per share. The February 2019 Note is payable upon the written demand of the holder thereof at any time after March 1, 2024 (the "Maturity Date"). Interest accrues on the unpaid principal amount at a rate equal to 5% per annum, but it is not due and payable until the written demand of the holder for payment on or after the Maturity Date. The current outstanding principal amount, if converted into common stock, would result in the issuance of 4,166,667 shares. The number of shares of common stock to be issued upon conversion will be fixed on the conversion date and reported on a Form 4 within two business days after conversion.
F3The February 2019 Warrant is exercisable into up to 2,884,615 shares of the issuer's common stock and is exercisable, in whole or in part, at any time and from time to time, from August 26, 2019, the date that is sixth months after the date of purchase, through February 26, 2024, the fifth anniversary of such date.
F4Dispositive power over the shares of the issuer's common stock owned by Essetifin is shared by Enrico Cavazza, Silvia Cavazza, Francesca Cavazza, Martina Cavazza Preta and Paolo Cavazza. Each of Enrico Cavazza, Silvia Cavazza, Francesca Cavazza, Martina Cavazza Preta and Paolo Cavazza disclaims beneficial ownership of all shares of Common Stock held by Essetifin except to the extent of any pecuniary interest therein.

Remarks

Exhibit List: Exhibit 99.1 - Joint Filers' Signatures