Compounds 6 and 7 may be biosynthetized from the precursor 1 through the cyclization of the geranyl chain with the adjacent hydroxy groups 4′-OH and 2′-OH, respectively
compounds 6 พลับ may : biosynthetized เริ่มต้น precursor 1 through the cyclization ของ the geranyl chain with the adjacent hydroxy สูงสุด 4 ′จะ oh ( ′จะ oh , respectively