Provided are a PGE 2 production suppressant, an anti-inflammatory agent, a melanin production suppressant and a skin whitening agent, which are further excellent. The present invention relates to an anti-inflammatory agent composition, a PGE 2 production suppressant composition, a melanin production suppressant composition, or a skin whitening agent composition comprising one or more kinds selected from pentaerythritol, an alkyl acetal derivative of pentaerythritol represented by the formula (1) described below, and an alkyl acetal derivative of pentaerythritol represented by the formula (2) described below: wherein R 1 and R 2 may be different from each other to represent C 1-4 alkyl； and wherein R 3 to R 6 may be different from each other to represent C 1-4 alkyl.本發明提供更優越之PGE2產生抑制劑、消炎劑、黑色素生成抑制劑、美白劑。本發明係關於含有選自包含季戊四醇、下述一般式(1)所示之季戊四醇之烷基縮醛衍生物、及下述一般式(2)所示之季戊四醇之烷基縮醛衍生物之1種或2種以上的消炎劑組成物、PGE2產生抑制劑組成物、黑色素生成抑制劑組成物或美白劑組成物。(式中，R1及R2可彼此相異，表示碳數1~4之烷基；)(式中，R3~R6可彼此相異，表示碳數1~4之烷基。)
