“…S eco- abietane diterpenoids are a small group of natural products. To date, a total of 58 such compounds have been reported from plants of the genera Abies , Cephalotaxus , Colus , Cordia , Hyptis , Isodon , Pinus , Premna , Salvia , Taiwania , Thuja , and Vitex , including a 1,2- seco -abietane [ 8 ], a 1,10- seco -abietane [ 9 – 10 ], three 2,3- seco -abietanes [ 8 , 11 – 13 ], three 3,4- seco- abietanes [ 8 , 14 ], 31 4,5- seco -abietanes [ 8 , 15 – 16 ], ten 6,7- seco -abietanes [ 8 , 17 – 19 ], two 7,8- seco -abietanes [ 8 , 20 ], two 8,14- seco -abietanes [ 21 – 22 ], three 9,10- seco -abietanes [ 22 – 23 ], and two 9,11- seco -abietanes [ 24 – 25 ] . Among the above seco -abietanes, only laxiflorin V is a seco - ent -abietane [ 14 ].…”