below are drawn three different natural substances, Azamerone, Silychristin and Dicoumraol. a. mark and name the functional group in Azamerone. b. mark stereocenters (chiral/asymmetric carbon atoms) with asterisks () in Silychristin. c. how many signals will Dicoumarol give in C13NMR spectrum (number C for each expected signal). Dicoumarol