Just two years ago, things looked rosy for Amyris, the biofuels-maker-turned-beauty-brand incubator. It spun its squalane (a skin barrier-strengthening alternative to increasingly out-of-favour squalene, derived from shark liver) into a successful brand, Biossance, and rolled out lines with model Rosie Huntington Whiteley and hair stylist and “Queer Eye” star Jonathan Van Ness. Amyris appeared to have leveraged its sugarcane-derived…