| 摘要 |
A composition is prepared by: preparing an aqueous solution of sodium citrate and citric acid; and combining fresh kelp with the aqueous solution. The ratio between the sodium citrate and citric acid in the aqueous solution is about 10:1, by mass. The composition includes at least one of: 4-(3,5- dihydroxyphenoxy)dibenzo [b,e][1,4]dioxine-1,3,6,8-tetraol; 8-(2,4,6- trihydroxyphenoxy)-4-(3,5-dihydroxyphenoxy)dibenzo [b,e][1,4]dioxine -1,3,6- triol; 8-(2,4,6-trihydroxyphenoxy)-9-(3,5-dihydroxyphenoxy)dibenzo [1,4]dioxine-1,3,6-triol; and (8S,9S,10R, 13R,14S,17R)- 2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-17-(R,E)-5-isopropylhept-5 -en-2-yl)-10,13-demethyl-1H-cyclopenta[a]phenanthren-3-ol. |
