This is the fictional formula (Nital) that depetrifies stoned people and stoned birds in the Z=1 Stone World. chapter 1 p30
Senku puts a pail for the Nitric Acid dripping near the spot where he and Taiju depetrified. chapter 2 p6-8 He tries the Nitric Acid on the stoned birds but it did not work. chapter 2 p10 Then Taiju hints about sake using grapes and made the wine. chapter 2 p12-16
They continued making Brandy. chapter 2 p17 And they later found the stone formula. chapter 2 p20-22
IMAGE Senku thought about something chapter 2 p13
Senku tried the stone formula on other statues. chapter 3 p3
Mixing the stone formula. chapter 5 p7
Senku hypothesizes the formula. chapter 5 p12
The Stone Formula heals her. chapter 7 p12