Figure 2
From: Mechanistic insights into photochromic 3H-naphthopyran showing strong photocoloration

Thermal decoloration of TC → CF for compound 1 involves two reaction steps TC → INT and INT → CF, the first step is reversible15.
From: Mechanistic insights into photochromic 3H-naphthopyran showing strong photocoloration

Thermal decoloration of TC → CF for compound 1 involves two reaction steps TC → INT and INT → CF, the first step is reversible15.