The red alga Laurencia nipponica comprises various chemical races distributed relative to the ocean current in Japanese coastal areas. We investigated the chemical compositions and chemical races of L. nipponica distributed from the Kunashiri and Etorofu Islands, the confluence of the Soya warm current and Oya‐shio cold current. Two new halogenated secondary metabolites, deacetylneonipponallene (1) and neopacifenol (2), along with four known compounds, deoxyprepacifenol (3), pacifenol (4), halo‐chamigrene diether (5), and isolaurallene (6) were isolated from L. nipponica collected at Chikappunai, Kunashiri Island, while Zaimokuiwa (Kunashiri Island) and Sana (Etorofu Island) populations contained 3, 7‐hydroxylaurene (7), 2,10‐dibromo‐3‐chloro‐9‐hydroxy‐α‐chamigrene (8), and (3Z)‐laurefucin (9). The structures of 1 and 2 were established using spectroscopic methods. The chemical races of L. nipponica distributed in this area were divided into 6‐ and 9‐producing races. Interestingly, both races contained 4 as an additional race‐index, as well as its derivatives, 2 and 5. To the best of our knowledge, this is the first example of a race comprising a mixture of two race‐index compounds, suggesting that the convergence of two currents causes the production of new and diverse chemical races in this species.
In the article of issue 9, Vol. 18, 2021, page e2100397, the correction list is as follows:(1) Page 4, line 10 from the top of the right column; pacifenol (4) should be corrected to prepacifenol.(2) Page 4, line 11 from the top of the right column; laurefucin (9) should be corrected to (3Z)-laurefucin ( 9). (3) Page 4, line 21 from the top of the right column; sesquiterpenoid 4 should be corrected to sesquiterpenoid, prepacifenol. (4) Page 4, line 13 from the bottom of the right column; 4-producing should be corrected to prepacifenol-producing. (5) Page 4, line 2 from the bottom of the right column; laurefucin should be corrected to isolaurallene. (6) Page 5, line 1 from the top of the left column; isolaurallene should be corrected to (3Z)-laurefucin. (7) Page 5, Figure 4; • Pacifenol-producer should be changed to • Prepacifenolproducer. (8) Page 5, Figure 4; ■ Laurefucin-producer should be changed to ■ (3Z)-Laurefucin-producer. (9) References; [25] should be changed to H.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.