label: (Hexamethylene diisocyanate (HDI)+Diphenylmethane diisocyanate (MDI)+Toluene diisocyanate (TDI)+Phthalic anhydride)
label_lc: (hexamethylene diisocyanate (hdi)+diphenylmethane diisocyanate (mdi)+toluene diisocyanate (tdi)+phthalic anhydride)