c1 is dragon's blood [bright red resin] of plant species c2 (genus Croton/Dracaena/Daemonorops/Calamus rotang/Pterocarpus).
The red resin was used in ancient times as varnish, medicine, incense, and dye. It continues to be employed for the aforementioned purposes by some. Not to be confused with blood from a dragon which is "lo ciblu be lo ranmrdrakono".