Calocedimers A, B, C, and D from the Bark of Calocedrus macrolepis var. formosana

Abstract

Calocedimers A, B, C, and D, together with four known compounds, platydiol, alpha-cadinol, ferrugiol, and 6,7-dehydroferrugiol, were isolated from the bark of Calocedrus macrolepis var. formosana. Calocedimers A, B, C, and D are the dimers of abietane-O-camphane, abietane-O-cadinane, abietane-O-abietane, and abietane-O-abietane, respectively. Their structures were elucidated from spectroscopic data.

Effect of temperature on tensile and creep‐recovery properties of braided polyester harness cord

“…It should be noted that the creep rate at lower temperature turned to stable plateau for less time duration. Hsieh drawn the same conclusion about the creep behavior of the PVC‐coated polyester geogrid . Similarly, on increasing the tension from 5 to 15% BF, the initial creep rate in Figure (d–g) increased rapidly by 718.5, 422.2, 184.7, and 65.8%, respectively, indicating that PET harness cord was more sensitive to tension under lower temperature.…”

“…So far, many studies have been conducted on the tensile and creep properties of textile materials under different temperatures and tensions. For example, Hsieh found that both the ultimate tensile strength and the creep modulus of PVC coated PET geogrid decreased, and the creep strain rate increased as the test temperature went up. Tsobkallo studied the tensile properties of Phenylon and Nomex yarns at different temperatures as well as the effect of temperature and stress on residual deformation of yarns after creep‐recovery process.…”

Natural sesquiterpenoids

“…143 Three novel dehydroabietane diterpenes sugikorojins G-I 166-168, which incorporate a cadinane sesquiterpene in their structure, have been isolated from Cryptomeria japonica, 144,145 whilst a diterpene-sesquiterpene ether 169 has been obtained from Calocedrus macrolepis, and named calocedimer B. 146 Chromatography of an extract from Phomopsis cassiae, an endophytic fungus associated with Cassia spectabilis, afforded five new cadinane derivatives 170-174. 147 A patent describing the cytotoxic activity of the dimers parviflorene H and parviflorene I has appeared.…”

Antifungal properties of ethanolic extract and its active compounds from Calocedrus macrolepis var. formosana (Florin) heartwood

“…Recently, four novel compounds, calocedimers A, B, C, and D from the bark of C. marolepis var. formosana were identified (Hsieh et al, 2006). However, the novel compounds have not been studied for their bioactivities.…”